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Sigma announces super-fast 18-35mm F1.8 DC HSM Art for APS-C DSLRs

By dpreview staff on Apr 18, 2013 at 05:00 GMT
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Sigma has announced the 18-35mm F1.8 DC HSM Art lens for APS-C DSLRs - the world's first constant F1.8 zoom. The lens covers a 27-52.5mm equivalent range, and will be available in Canon, Nikon and Sigma mounts. As yet there is no announcement of a recommended price. The lens will offer the depth-of-field equivalent of a constant F2.7 on full-frame, and allow the use of lower ISO settings in low light, which may under-cut the need for some photographers to change formats.

We're impressed to see a manufacturer creating a high-end lens for APS-C at a time when the big DSLR manufacturers are trying to tempt users across to full-frame bodies and the additional lenses that such a move can require. At a time when APS-C cameras (and their sensors) are so good, and continue to make up such a large proportion of DSLR sales, it makes sense to offer high-quality lenses to support them.

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Press Release: 

Sigma Corporation announces world's first F1.8 constant aperture zoom lens

RONKONKOMA, NY, Apr. 18, 2013 — Sigma Corporation of America (www.sigmaphoto.com), a leading researcher, developer, manufacturer and service provider for some of the world's most impressive lines of lenses, cameras and flashes, today announced the Sigma 18-35mm F1.8 DC HSM Art lens, the market’s first zoom lens to achieve a maximum aperture F1.8 throughout the entire zoom range.

This revolutionary, wide aperture, standard zoom lens is created for DSLR cameras with APS-C size sensors, which translates to a focal range of 27-52.5mm on a 35mm camera. With a minimum focusing distance of 11 inches, and a maximum magnification ratio of 1:4.3, the 18-35mm is ideal for landscapes, portraits, still-life, studio, close-up and casual photography.

"Exceptionally fast apertures were previously unavailable in zoom lenses, so photographers turned to several prime lenses in a session to get bright images at various focal lengths. We're incredibly excited to be the first manufacturer to bring the F1.8 standard zoom to the market and to provide photographers with a new level of creativity and convenience, with the outstanding image quality at the core of the new Sigma Global Vision," said Mark Amir-Hamzeh, president of Sigma Corporation of America.

Amir-Hamzeh added that because developing a large aperture wide angle zoom lens can prove to be technologically and optically challenging, often resulting in various distortions, aberrations and field curvature, Sigma has tapped into its long history as a lens pioneer to overcome those issues in this new generation lens.

"Our experience with the wide angle designs of our 12-24mm F4.5-5.6 II DG HSM and our 8-16mm F4.5-5.6 DC HSM, and our research and development in our Aizu factory have prepared us for this technological advancement,” he said. “Our wide, glass-molded aspherical lens and the incorporation of Special Low Dispersion (SLD) glass have optimized power distribution of the optical elements and compensated for various aberrations, as well as curvature of field at the widest angle. We’re extremely proud of this achievement."

The 18-35mm is the latest addition to the company’s company’s Art line of lenses, designed under the new Global Vision. The Global Vision lenses have a sleek new design with the manufacturing year stamped on the barrel, and are categorized by use into one of three groups: Art, Contemporary and Sports. The Art category delivers high-level artistic expression through sophisticated and abundant expressive power.

The new 18-35mm lens incorporates Sigma’s improved AF/MF switch and the use of Thermally Stable Composite (TSC) compound material, which has a high affinity to metal parts, consistently performs well at extreme temperatures, and reduces the size and weight of the lens. It is also compatible with Sigma’s new USB Dock, which will be available in coming months, enabling photographers to update lens firmware and adjust focus parameters from their computers.

Convenient handling is achieved with internal focusing and zooming, which prevents changes to the size of the lens. Additionally, the front part of the lens does not rotate, so special filters like circular polarizers can be used.

The 18-35mm lens’ Super Multi-Layer Coating reduces flare and ghosting and provides sharp and high contrast images, even in backlit conditions. The petal-type hood that is supplied with the lens will provide extra protection from flare and ghosting. Sigma’s Hyper Sonic Motor (HSM) ensures a silent, high-speed AF function and the optimized auto focus algorithm results in smooth focusing and full-time manual focusing capability. Lastly, the nine-blade, rounded diaphragm creates an attractive, round bokeh at large-aperture settings.

Sigma 18-35mm F1.8 DC HSM specifications

Principal specifications
Lens typeZoom lens
Max Format sizeAPS-C / DX
Focal length18–35 mm
Image stabilisationNo
Lens mountCanon EF, Nikon F (DX), Pentax KAF, Sony Alpha, Sigma SA
Aperture
Maximum apertureF1.8
Minimum apertureF16.0
Number of diaphragm blades9
Aperture notesRounded diaphragm
Optics
Elements17
Groups12
Special elements / coatings5 SLD glass elements, 4 glassmold aspherical elements
Focus
Minimum focus0.28 m (11.02)
Maximum magnification0.23×
AutofocusYes
Motor typeRing-type ultrasonic
Full time manualYes
Focus methodInternal
Distance scaleYes
DoF scaleNo
Physical
Weight810 g (1.79 lb)
Diameter78 mm (3.07)
Length121 mm (4.76)
Zoom methodRotary (internal)
Filter thread72 mm
Hood suppliedYes
Hood product codeLH780-03
184
I own it
439
I want it
20
I had it
Discuss in the forums

Comments

Total comments: 724
1234
LukeDuciel
By LukeDuciel (Apr 18, 2013)

Wow. Sigma has step it on.

It's a good stir to the old & lazy big boys. I wonder whether they will have a smaller version for the APS-C mirrorless bodies.

0 upvotes
Kendall Helmstetter Gelner
By Kendall Helmstetter Gelner (Apr 18, 2013)

This is for the APC-C bodies (DC part of designation)! You don't get this wide and that fast without something giving, and the something is weight.

0 upvotes
Combatmedic870
By Combatmedic870 (Apr 18, 2013)

Wow, 1.8 zoom with internal zooming! Crap, thats nuts!

2 upvotes
CeleryBeats
By CeleryBeats (Apr 18, 2013)

Bravo Sigma! Bravo!!

13 upvotes
The A-Team
By The A-Team (Apr 18, 2013)

You get a 28 1.8, 35 1.8, and 50 1.8 all in one lens? BEAST.

2 upvotes
DuxX
By DuxX (Apr 18, 2013)

ye ye... and what about quality? It's not all in the numbers. I'll wait for the first samples.

1 upvote
Plastek
By Plastek (Apr 18, 2013)

It's 18-35mm. Not 28-50.

0 upvotes
NetMage
By NetMage (Apr 19, 2013)

That would be the FF equivalent focal lengths...

0 upvotes
Nukunukoo
By Nukunukoo (Apr 18, 2013)

If my Sigma 17-70mm Contemprary is any indication on how this 1.8 performs, wow! Now where the hell is my notebook of wish lists?...

0 upvotes
Ak pinxit
By Ak pinxit (Apr 18, 2013)

Well , numbers are good , but lets wait for corner samples

0 upvotes
Nukunukoo
By Nukunukoo (Apr 18, 2013)

Check the 17-7-mm C lens, its cheaper offering, not bad at all. Wait, check ALL of Sigma's new series! It put my Nikkor 17-55mm to shame and gave my 35mm 1.8 a run for its money!

2 upvotes
the reason
By the reason (Apr 18, 2013)

its the first f1.8 zoom ever you bunch of whiners. it doesnt matter if its crop or if they used a "speed booster" or not. They did it.
A lot of people sound hurt here. Whats the matter? that f2.8 zoom suddenly doesnt feel as special? Go ahead an say the equivalency mantra to calm yourself

30 upvotes
Alphoid
By Alphoid (Apr 18, 2013)

Nope. It's not the first constant f/1.8 zoom. There are plenty of f/1.8 zooms (and even faster) for video cameras, machine vision applications, etc.

3 upvotes
D1N0
By D1N0 (Apr 18, 2013)

Not for the aps-c format there aren't. Which is the absolute minimum for any serious photography :p.

0 upvotes
Benarm
By Benarm (Apr 18, 2013)

Great alternative for 17-55/2.8 lens if you're willing to trade some zoom range for more light, Nikon and Canon have been ignoring to update their fast crop lens for a awhile now.

7 upvotes
TheProv
By TheProv (Apr 18, 2013)

Without 50/55mm no portraits, the only annoying thing of this wonderful lens.

0 upvotes
JEROME NOLAS
By JEROME NOLAS (Apr 18, 2013)

Sigma rocks! But hey, we also got Pentax Q and K01, Nikon 1, Canon EOS-M.
Always makes me wonder how creative you have to be to work to work for these dinosaurus....

0 upvotes
Nukunukoo
By Nukunukoo (Apr 18, 2013)

I don't get your point. We're talking about lenses here.

3 upvotes
JEROME NOLAS
By JEROME NOLAS (Apr 18, 2013)

I know, one would expect "leaders" like CA, NI, PE to come up with exciting products like this lens. Instead we get garbage...

0 upvotes
Plastek
By Plastek (Apr 18, 2013)

"dinosaurus." - WTF?!

0 upvotes
vFunct
By vFunct (Apr 18, 2013)

Would be useful for cinema applications. Need to know if there's any focus/zoom breathing.

0 upvotes
sunnycal
By sunnycal (Apr 18, 2013)

A 27-50mm f/1.8 zoom! Are you kidding! If price is right, I might get it for my D800 and shoot in DX mode.

Comment edited 15 seconds after posting
1 upvote
tkbslc
By tkbslc (Apr 18, 2013)

Or you could shoot existing f2.8 lens in FX mode and essentially have the same pictures, only with gobs more detail.

3 upvotes
sunnycal
By sunnycal (Apr 18, 2013)

That is not correct. f/1.8 is f/1.8 regardless of sensor size. If I shoot 28mm f/1.8 on full frame, and then crop to DX size, the aperture did not change. Each pixel still got the same amount of photons (not less, not more).

People get confused about this all the time. A full frame lens will accumulate more light over the "total" area of sensor. However that figure is meaningless for photographers. A pixel is only concerned with how much light it gets (or the surrounding Bayer array gets). It does not care overall how much light the entire sensor collects.

3 upvotes
handrian
By handrian (Apr 18, 2013)

You see the whole picture, you don't print a single pixel and put it on the wall.
So the light accumulated in the total area maters, and a 18-35 f1.8 lens on APS it's the same as an 27-50 2.8 lens on FF.

1 upvote
sunnycal
By sunnycal (Apr 18, 2013)

If you were shooting at ISO 100 for a given exposure on FF, would you change your ISO if you use the same exposure on APS? No, you don't need to change your exposure. The exposure remains the same regardless of sensor size (even when using phone camera).

You would be correct if you were only trying to calculate equivalent FOV. In which case 18 is roughly equal to 27. But Focal length ain't exposure.

Comment edited 2 times, last edit 1 minute after posting
2 upvotes
Alphoid
By Alphoid (Apr 18, 2013)

sunnycal: You are incorrect. handrian is right. The level of noise of the overall image will be identical if you shoot f/2.7 full-frame or f/1.8 cropped (assuming same exposure, and appropriately scaled ISO). Only real difference is that you lose a few MP going to DX-size, and likely have worse lens performance (we have to wait for samples, but it's hard to build an f/1.8 zoom with the same IQ as an f/2.8).

3 upvotes
sunnycal
By sunnycal (Apr 18, 2013)

What does noise have to do with this? Exposure is exposure. You choose exposure to get picture brightness and contrast right. We increase ISO not because we like noise, but because we want the exposure correct.

It is true that FF cameras typically have better noise performance, but

1. It does not matter at low ISO, they are practically the same. and a fast lens helps keep the ISO low and shutter fast.

2. Assuming that all APS cameras have higher noise then all FF cameras is stupid. Pentax K-II has equal or better noise performance at any ISO then the original 5D.

3. Read my original post. I said I will use it on my D800 in DX mode. How would the noise on my D800 change if I change crop mode?

Next time you shoot with your phone, check the exposure and overexpose by three stops to compensate for the small sensor of phone camera.

Comment edited 7 minutes after posting
2 upvotes
D1N0
By D1N0 (Apr 18, 2013)

Handrian F1.8 does not make brighter pics on FX than on DX. What is does do is give relatively shallower DOF (since you're not cropping). That's why FX pics have more of a film feel to them.

1 upvote
Alphoid
By Alphoid (Apr 18, 2013)

sunnycal: If you have sensors of the same technological sophistication, and you shoot APS, 1/8s, ISO1250, f/1.8, the depth-of-field, image-level noise, exposure will be identical to shooting full frame 1/8s, ISO2000, f/2.7. Full frame will have somewhat better resolution and/or dynamic range. All else being equal -- which with lenses it almost never is -- the f/2.7 lens will also have lower aberration.

2 upvotes
DStudio
By DStudio (Apr 18, 2013)

f/1.8 is still 1 1/3 stops faster, so you can still shoot with that much less light on the same camera. Whether the noise and overall effect is considered better in the end is the result of numerous factors, but the fact is you can get proper exposure at maximum ISO with less light on the same camera.

0 upvotes
Alphoid
By Alphoid (Apr 18, 2013)

DStudio: If you shoot maximum ISO and crop, you'll get insane noise. If you're willing to live with insane noise, you can also underexpose while shooting RAW, and boost exposure in post-processing.

0 upvotes
sunnycal
By sunnycal (Apr 18, 2013)

Alphoid: You dont get it. First of all you are comparing the whole system, and we are talking of just lens. Even when comparing systems. your assumptions are only valid for high ISO. At low ISO (100-800) there is no practical difference between modern APS and FF cameras. However f/1.8 is still brighter then f/2.7 on sensor of any size, any vendor, any generation.

Tell me this? When I shoot my D800 in DX mode, how is the noise going to be different then when I shoot in FX mode?

0 upvotes
NetMage
By NetMage (Apr 19, 2013)

For high ISO pictures, the noise will be higher for a given picture (I.e. equal perspective) in DX mode than in FX mode - consider the same proportion of pixels will be noise (I.e. meaningless) but the whole picture has fewer pixels, hence the DX SNR is higher e.g. the picture is noisier.

At low ISO, the 1.8 on DX gains a disproportionate advantage since your are correct there - assuming you don't have any low exposure areas such as shadows in your picture.

1 upvote
Alphoid
By Alphoid (Apr 20, 2013)

sunnycal: NetMage is correct. But just do an experiment. Shoot a photo. Crop out a portion of the photo, and resample both to the same resolution. Compare noise levels. You will find the cropped version will have higher noise.

0 upvotes
RichRMA
By RichRMA (Apr 18, 2013)

It's a 2:1 zoom range. Not huge, and it'll be interesting to see if anyone stops using some of the fantastic f/2.0 to f/1.4 primes in that range and uses the Sigma instead.

0 upvotes
Nishi Drew
By Nishi Drew (Apr 18, 2013)

Yeah like.... the fantastic SIGMA lens?
LOL, I can't get the 35mm off of my camera unless I actually 'need' to go wider or longer

2 upvotes
straylightrun
By straylightrun (Apr 18, 2013)

This lens is like having a 18/1.8, 23/1.8 and 33/1.8 (28, 35, 50) all in 1 lens without having to carry 3 different primes and swapping them.

5 upvotes
Nishi Drew
By Nishi Drew (Apr 18, 2013)

I don't see myself stopping my use of the 35mm and start using this lens, unless I get my hands on a crop camera again, then yes it's 2/3 of a stop slower but zooms, that is awesome. And would be lighter than carrying all three lenses, doesn't require the space either

0 upvotes
straylightrun
By straylightrun (Apr 18, 2013)

Too bad they didn't include IS. Still, this lens will be a low light machine for Sony/Pentax users. I'm guessing RRP will be at least $2000?

Comment edited 2 minutes after posting
2 upvotes
Benarm
By Benarm (Apr 18, 2013)

Looks like this lens will be made only for Canon/Nikon mounts..

Oh well :(

Comment edited 2 times, last edit 53 seconds after posting
0 upvotes
DStudio
By DStudio (Apr 18, 2013)

This is all speculative - neither pricing nor mounts have been anounced yet.

1 upvote
Benarm
By Benarm (Apr 18, 2013)

@DStudio,
Checkout Sigma website, only the Canon, Nikon and Sigma mounts are listed there.

0 upvotes
DStudio
By DStudio (Apr 18, 2013)

@Benarm - Thanks. Must have been added since dpr initially wrote the article.

However, this is typical - it doesn't mean that Pentax and/or Sony mounts aren't coming later. In fact, if you look at the page, there are two blank rows below Canon, Nikon, and Sigma.

0 upvotes
Krich13
By Krich13 (Apr 18, 2013)

Well, let me guess... A full-frame 25-50 f/2.8 lens with a built-in Metabones-style telecompressor (aka speed booster)?
I know, the Metabones design only works without a mirror box. They seem to have modified this idea to accomodate a short mirror of an APS-C. These three rer elements do look suspiciously like a focusing group behind the main lens.

MTF looks great (again, just like the speed booster), and that again could be the effect of compression. BTW, at what spatial frequencies is it measured? For cropped sensor (x1.5) I would expect 15 and 45 cycles/mm. If 10/30 cycles/mm is used -- that's cheating.

0 upvotes
RichRMA
By RichRMA (Apr 18, 2013)

At one point, some companies used 60. But that looks really bad for most lenses.

0 upvotes
Krich13
By Krich13 (Apr 18, 2013)

Olympus still has decency to use 20/60 for their lenses dedicated for x2 crop.

0 upvotes
ajamess
By ajamess (Apr 18, 2013)

This was my thought, too (see my comment below). I see no other way of accomplishing such an optical design without it being prohibitively expensive / bulky.

0 upvotes
stevens37y
By stevens37y (Apr 18, 2013)

There is no reason to think of the FF it's not a reference. It simply a design for APS-C with a given characteristics. The question is only the size/weight/price/market. For stills I think it will be more economical to buy 2 primes than this but for filmmakers this is really revolutional.

2 upvotes
DStudio
By DStudio (Apr 18, 2013)

Actually it's not revolutional - it's IF and the front element doesn't rotate! ;)

1 upvote
gefrorenezeit
By gefrorenezeit (Apr 18, 2013)

Sigma got the hang lately. ;) I use the 35mm lens happily. I just would wish they did not omit wheather sealing....

1 upvote
tkbslc
By tkbslc (Apr 18, 2013)

Hope they make a 50-100mm f1.8 to go with it!

1 upvote
ceaiu
By ceaiu (Apr 18, 2013)

Or at least a 35-70mm f1.8. Above 70mm one could use the ft glass.

1 upvote
Qwntm
By Qwntm (Apr 18, 2013)

This just SCREAMS Pentax K-5iis. It would be stupid if Sigma didn't make it in Pentax mount.

8 upvotes
RichRMA
By RichRMA (Apr 18, 2013)

I didn't see, is the lens weatherproof, like that camera body?

1 upvote
D1N0
By D1N0 (Apr 18, 2013)

It's not like the pentax will disintegrate when you use a none weatherproof lens, or that is has to rain in order to shoot with it.

3 upvotes
RichRMA
By RichRMA (Apr 18, 2013)

Olympus did something like this (for 4/3rds format) some time ago.
http://www.dpreview.com/products/olympus/lenses/oly_14-35_2_swd

2 upvotes
Paul Storm
By Paul Storm (Apr 18, 2013)

congrats sigma, keep it up and you'll soon be the company the other lenses are compared to, including leica.

Comment edited 29 seconds after posting
2 upvotes
Ashuaria Lee
By Ashuaria Lee (Apr 18, 2013)

Wow...F1.8 constant zoom lens...never imagined before..

2 upvotes
iudex
By iudex (Apr 18, 2013)

Please make also a Pentax mount and I am in!
I am afraid the price will be painful but with such a unique lens Sigma can definitely afford it.

5 upvotes
Photomonkey
By Photomonkey (Apr 18, 2013)

Sigma has done a great job of developing a lens that people have been clamoring for yet we get all sorts of carping about it not being FF, the aperture is "functionally f 2.7" they use "tricks" to get the speed to f1.8. and so on.

This lens IS f1.8. It IS large. It WILL BE expensive. Get over it and enjoy what they have done.

13 upvotes
thx1138
By thx1138 (Apr 18, 2013)

mmm'kay

Feel better with your rant.

0 upvotes
ottonis
By ottonis (Apr 18, 2013)

Well said! This lens is a definite breakthrough and it's great to have such fantastic options at our disposal. Of course, everybody will have to judge for themselves if the IQ and speed of the lens outweigh its size and cost. But it's really great to have the option!
Well done, Sigma. Kudos to you!

2 upvotes
Jun2
By Jun2 (Apr 18, 2013)

price?

0 upvotes
iudex
By iudex (Apr 18, 2013)

Considering the 17-50/2,8 costs 980 USD (MSRP) and the new 35/1,4 costs 1400 USD, this new super-fast zoom might be cca. 1200-1400 USD MSRP and I doubt the street price will be lower than 1000 USD.

0 upvotes
tkbslc
By tkbslc (Apr 18, 2013)

I'd guess $1200. If it was a Canon it would be $2000, but Sigma usually can't get away with that.

0 upvotes
Nishi Drew
By Nishi Drew (Apr 18, 2013)

The Sigma 35mm can be had for less than $950, and considering the 18-35 does not have any OS it could be right around $1,000

1 upvote
Alphoid
By Alphoid (Apr 18, 2013)

Considering Sigma's 200-500mm f/2.8 is $26,000, Sigma sometimes gets away with a lot. Still, if Sigma can give this a reasonable price -- competitive with the f/2.8 zooms -- they can probably dominate the market.

0 upvotes
StyleZ7
By StyleZ7 (Apr 18, 2013)

I waited this for years. And now finally when I move to FF, they roll this out :)
I know, that Canon had a patent for this a long time ago, but look – Sigma got them first.
Good job! And next stop – something identical for FF!? But probably much more heavy and bulky.

0 upvotes
ajamess
By ajamess (Apr 18, 2013)

This lens looks like it uses the same "trick" the Metabones Speedbooster uses, e.g. compress a full frame image circle down to ASP-C size.

Definitely great marketing, and a great application of clever optics, but it is not "truly" an f/1.8 lens, in the purest sense of the word (it would be much more expensive and a decent amount larger if it were).

MTF looks pretty impressive, so no matter how they came about it, I think it's a pretty big win for the crop shooters out there.

1 upvote
Photomonkey
By Photomonkey (Apr 18, 2013)

I guess we will have to wait til you show us your design then. I am sure you won't resort to such "tricks" like using glass or metal.

12 upvotes
ajamess
By ajamess (Apr 18, 2013)

Why are you attacking me? I was merely attempting to explain the likely technology behind this achievement. This lens would have to be much bigger / heavier if the aperture was a true f/1.8 for that zoom range.

The reason this is the case is because in order to get wide FOV's (<20mm or so), the optics have to use what's called a retrofocus design, making it much more difficult to achieve large apertures.

Jeeze. A guy can't even post interesting commentary on optical design any more without getting yelled at.

6 upvotes
tkbslc
By tkbslc (Apr 18, 2013)

Nearly all lenses wider than the mount depth have to resort to reverse telephoto design called retrofocus. You do what you gotta do to design the lens. As long as the DOF and light are roughly f1.8, the design is irrelevant.

10 upvotes
Kinematic Digit
By Kinematic Digit (Apr 18, 2013)

Like tkbslc already stated with retrofocus. A 14mm SLR lens certainly isn't 14mm away from the sensor.

0 upvotes
ThatsTheShot
By ThatsTheShot (Apr 18, 2013)

Wow, way to go, this is great news!!! Oh didn't see the bit about it's not for FF? Hope a FF version will be coming soon. Still is great news! :)

Comment edited 2 times, last edit 2 minutes after posting
3 upvotes
Peiasdf
By Peiasdf (Apr 18, 2013)

Wow, this is real. I thought someone created a bad rumor. Wish it is FF

3 upvotes
KBarrett
By KBarrett (Apr 18, 2013)

FF systems already have better alternatives, 24-70/2.8 is a 3x zoom with the same depth of field per angle of view as this lens.

6 upvotes
the reason
By the reason (Apr 18, 2013)

so the fact that shutter speeds will be 1 1/3 of a stop faster doesnt matter?

6 upvotes
Jon Rty
By Jon Rty (Apr 18, 2013)

Well, shutter-speeds won't be 1 1/3 faster for the same SNR, tonal-range or dynamic range. The bigger sensor will gather more light for any given f-stop, meaning that you can up the ISO and get similar picture quality to the smaller sensor. And by doing so, your shutter-speeds increase.

5 upvotes
Combatmedic870
By Combatmedic870 (Apr 18, 2013)

The reason,
EXACTLY!!

0 upvotes
qwertyasdf
By qwertyasdf (Apr 18, 2013)

Can't wait to pop it on FF to see how large is the image ciricle though

2 upvotes
the reason
By the reason (Apr 18, 2013)

Jon in theory that all sounds very nice, but you must know by now that in practice that doesnt hold true. APS C sensors are withing 1/3 to 1/2 stop of ff sensors in noise control, heck, m4/3s sensors are getting mighty close. A difference you wont really notice in real life.

I also know most ff users dont go beyond a certain ISO anyway. What if im already at ISO 6400 with my APS C? will you hike your ff to ISO 16k to match my shutter speed? your answer will probably be yes, but samples higher than ISO 12k around the web are scarce and rare, so in reality you probably wont.

2 upvotes
Eigenmeat
By Eigenmeat (Apr 18, 2013)

Way to GO SIGMA!!! Their recent releases had all been top notch, and this one takes it to the next level. Finally, we see some real optical break through!
With this, we are one step closer to the eventual 8-400mm F1.8!!

Comment edited 44 seconds after posting
13 upvotes
DonSantos
By DonSantos (Apr 18, 2013)

24-48mm 1.8 zoom for ff please.

7 upvotes
JLim22
By JLim22 (Apr 18, 2013)

YES PLEASE!!!!

1 upvote
ZAnton
By ZAnton (Apr 18, 2013)

For APS-C it weights 810 gr, for FF that will be 1,5-2 kg. to say nothing about price.

Comment edited 22 seconds after posting
3 upvotes
the reason
By the reason (Apr 18, 2013)

dont ask for such things...if a 24-70 f2.8 is 2100$, how much will a 24-48 f1.8 will be?

0 upvotes
ceaiu
By ceaiu (Apr 18, 2013)

Currently you have to choose between a zoom (which gives multiple focal lengths but it's slow) and primes (which are fast but offer single focal lenghts).
I was wondering why there aren't compromises, like very short (1.5x or 2x) zooms faster than 2.8.
I would have liked to see a 24-35mm (or 35-50), a 85-135mm, a 200-300mm ... zoom or with some sort of integrated TC - faster and with better iq than a zoom, and a little more versatile than a prime.
Sigma might know something about D400 and 7D2 arrivals, as without them there won't be to much of a market.
Bravo Sigma!!!

3 upvotes
Peiasdf
By Peiasdf (Apr 18, 2013)

With only a 1.5~2.0x zoom and you just zoom with your legs.

2 upvotes
Fleabag
By Fleabag (Apr 18, 2013)

Yes for APS-C

Comment edited 9 minutes after posting
0 upvotes
ceaiu
By ceaiu (Apr 18, 2013)

You can still zoom with your feet and transform that 2x into a 3x. It's still faster than your fastest 3x and more convenient than a couple of primes.

1 upvote
Ak pinxit
By Ak pinxit (Apr 18, 2013)

not much room for "feet zoom" inside apartment , you know

4 upvotes
RFC1925
By RFC1925 (Apr 18, 2013)

Feet zoom also changes perspective.

1 upvote
DonSantos
By DonSantos (Apr 18, 2013)

What aperture is the mtf measured?

Comment edited 1 minute after posting
0 upvotes
Eigenmeat
By Eigenmeat (Apr 18, 2013)

F1.8

1 upvote
ForeignerOnEarth
By ForeignerOnEarth (Apr 18, 2013)

The MTF are amazing:
http://sigma-global.com/en/lenses/cas/product/art/a_18_35_18/data.html

5 upvotes
rishardana
By rishardana (Apr 18, 2013)

I am very excited for this ... way to go Sigma!

0 upvotes
JDThomas
By JDThomas (Apr 18, 2013)

Sigma breaks a barrier and everyone is complaining that it's not full-frame. :)

43 upvotes
zakk9
By zakk9 (Apr 18, 2013)

Pretty amazing, isn't it? I wonder why all the geniuses on this forum don't design and make their own lenses.

11 upvotes
the reason
By the reason (Apr 18, 2013)

and complaining about the method on how they got to it too! It all sounds to me like sour ff owners trying to justify their equipment

3 upvotes
JDThomas
By JDThomas (Apr 18, 2013)

I'm surprised nobody is crying about no VR!

I don't think people comprehend how big an 18-35mm f/1.8 would be for FX.

I have at least one DX camera at all times so I'll be getting one of these for sure. I'm sending an email to my Sigma contact first thing in the morning to see when they can send me a test copy.

3 upvotes
JDThomas
By JDThomas (Apr 18, 2013)

Nevermind. Someone already brought up the "no VR" issue.

0 upvotes
peevee1
By peevee1 (Apr 18, 2013)

VR? Put it on Sony or Pentax, and it will magically get "VR". You know, for shooting at base ISO only. :)
Put it on Olympus, and in addition to getting stabilized, it will also lose heavy vignetting and corner blur. Although Oly already have f/2 zooms with more convenient range.

5 upvotes
LensBeginner
By LensBeginner (Apr 18, 2013)

Not all that useful to have VR for such short focal lengths...
Plus, if they made it for Pentax, that would turn out to be a non-issue.

0 upvotes
JDThomas
By JDThomas (Apr 18, 2013)

Do you people actually read what's written or just skim it over for keywords? I was actually poking fun at the people who will be crying for VR on a fast lens.

But for you Sony/Pentax "magic VR" folks. Remember that the in-camera VR is less effective than the in-lens VR due to space constraints.

0 upvotes
D1N0
By D1N0 (Apr 20, 2013)

Not an issue below 200mm though.

0 upvotes
acidic
By acidic (Apr 18, 2013)

I just noticed the weight. 810g for APS-C lens? Holy Shatner!

Okay, I know it's super fast and all that, but if it's seriously supposed to convince FF shooters to go APS-C, it's measly 2x zoom range isn't helping any, considering that it's FF counterparts don't weigh much more and have closer to 3x zoom range. Of course if it's significantly cheaper, say in the $900 range, it could be a winner.

0 upvotes
HobbiesAreFun
By HobbiesAreFun (Apr 18, 2013)

Even if it has a decent weight to it, if the image quality is on par with the 35mm f/1.4, it'll be like carrying around a 28mm f/1.8, 35mm f/1.8, and 50mm f/1.8 (for light gathering capacities, not DOF, as it'd be f/2.7 for DOF, but still.) I'd be very interested if I wasn't shooting FF.

1 upvote
Photomonkey
By Photomonkey (Apr 18, 2013)

The weight is proof that such lenses are not going to be small. As for the fact that the "competition" has a larger range and lighter weight, they don't have f1.8. Nor will it be cheaper.
It exists because so many asked for it. Now that the the lens is here you can't ask them to re-write the laws of physics and economics.

7 upvotes
acidic
By acidic (Apr 18, 2013)

Yeah, I know that they can't be small with such (relatively) large apertures. But honestly, if this lens costs $2K and weighs as much as it does, why would someone choose a crop body and this lens over a FF body and a 24-70mm/2.8?

I acknowledge that this lens has more light gathering ability at a given FOV (than 24-70/2.8 on FF), but given that a FF body is easily 2 stops better (with regards to noise), the advantage goes to FF. Not to mention that this lens damn will need to resolve more lpm due to smaller pixels than it's FF counterpart.

Of course, if it's in the $900 range, this lens makes total sense.

0 upvotes
NetMage
By NetMage (Apr 19, 2013)

But the Canon and Nikon 24-70 are around $2000 street and no FF body is as cheap as an APS-C body. So the setup will still be $1k cheaper at least, and possibly more.

0 upvotes
new boyz
By new boyz (Apr 19, 2013)

"But honestly, if this lens costs $2K and weighs as much as it does, why would someone choose a crop body and this lens over a FF body and a 24-70mm/2.8?"

Because he already has a crop body???

0 upvotes
Boiler_Jack
By Boiler_Jack (Apr 18, 2013)

Wondering who is this targeted at?

1 upvote
zakk9
By zakk9 (Apr 18, 2013)

I think photographers. Just a wild guess of course...

41 upvotes
DonSantos
By DonSantos (Apr 18, 2013)

If it was for ff I would have died an gone to heaven.

9 upvotes
JLim22
By JLim22 (Apr 18, 2013)

haha, i wish this was for ff too.

2 upvotes
Xentinus
By Xentinus (Apr 18, 2013)

@JLim22
Why you wanna see him dead? lol

12 upvotes
ZAnton
By ZAnton (Apr 19, 2013)

For FF it would be over 2 kilo weight.

0 upvotes
starwolfy
By starwolfy (Apr 18, 2013)

Amazing ! Well done Sigma. Too bad it's not a 16-35 but I guess I'm asking too much ;)

7 upvotes
acidic
By acidic (Apr 18, 2013)

Time to play guess the price.

4 upvotes
JohnMatrix
By JohnMatrix (Apr 18, 2013)

Looks great. It's very long(!) but that's to be expected - kudos to Sigma for putting this out. They're putting Canon & Nikon to shame with their latest line of lenses for non-FF users.

13 upvotes
James Cricket
By James Cricket (Apr 18, 2013)

Geez, I was just looking up something wider than 2.8 the other day. Too bad it's for crop only.

0 upvotes
Xentinus
By Xentinus (Apr 18, 2013)

omg!

0 upvotes
Spectro
By Spectro (Apr 18, 2013)

wow a first f1.8 zoom, go sigma.

Comment edited 2 times, last edit 2 minutes after posting
17 upvotes
3dreal
By 3dreal (Apr 18, 2013)

I have an old, used manual sigma high-speed wide 28/1.8 with c/y-mount. Not yet tested.
50/1.7 zeiss(c/y) + the 28/1.8 with FC-EOS-adapter= 600gr

Comment edited 6 minutes after posting
0 upvotes
mosc
By mosc (Apr 18, 2013)

There are lots of small sensor zooms that are bright. The RX100's zoom starts at f1.8 over a not miniscule 1" sensor even. First APS-C f1.8 zoom I'll give you for sure, but that's a big caveat.

0 upvotes
NetMage
By NetMage (Apr 19, 2013)

And by 35mm (equiv), its an f/2.8 while this is 1.8 past 50mm - if it is low distortion/ca it could be a prime competitor.

0 upvotes
Zmaj
By Zmaj (Apr 19, 2013)

I will never ever by sigma again even if it costs only one penny, no thanks :-)

0 upvotes
Total comments: 724
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