EinsteinsGhost

EinsteinsGhost

Lives in United States Dallas, TX, United States
Joined on Jun 21, 2011

Comments

Total: 322, showing: 81 – 100
« First‹ Previous34567Next ›Last »
In reply to:

kimchiflower: It's a shame these Sigma lenses are unnecessarily large on a m43 body as the image circle will cover the larger APS-C sensor of Sony's NEX.

On the plus side, I assume this translates into better corner sharpness for m43 as the corners of the image circle will be further from the edge of the frame.

But they are designed for APS-C sensor, so they have to be necessarily larger. For smaller sensor (MFT), the same FOV and DOF would require a 45mm f/2 design.

Direct link | Posted on May 2, 2013 at 16:52 UTC
In reply to:

Van Boxtel: Will there be a Fuji X mount in future?

Sigma should seriously consider X-mount as Fuji's lenses are priced high and offering low cost solution will be excellent marketing in the brand. OTOH, with Sony, this 60/2.8 will meet 50/1.8 OSS which is only about $50 more, has OSS, and is 1+ stop faster for low light photography, and is an excellent lens.

Direct link | Posted on May 2, 2013 at 16:50 UTC
In reply to:

roy5051: What on Earth is DN Art?

DN: Sigma designation for mirror-less lenses.
Art: Sigma lenses type ("Contemporary", "Art" and "Sports")

Direct link | Posted on May 2, 2013 at 15:38 UTC
In reply to:

Stacey_K: I find it comical when a camera system has a slew of amazing zooms, people complain "where are the primes? All I want are prime lenses." So them a camera system comes out with a bunch of nice primes and people bitch "We want zooms" lol

While I won't mind f/2.8 zoom, I think faster primes are a better option, especially at 35mm and 50mm. So, instead of a 16-50/2.8 (which I have and can use on NEX, I would rather carry 20/2.8 (pancake), 35/1.8 (tiny) and 50mm/1.8 (could be smaller) and have a 1+ stop advantage at Focal Lengths where it matters.

Direct link | Posted on May 2, 2013 at 15:21 UTC
In reply to:

cprevost: They will sell tons of these. Nothing else like it close to this price range. Hoping it goes down just a bit in price when it actually hits the street. If it's as good optically as the other two they'll have a hit. For many of us 60mm on micro four thirds is a focal length that doesn't get a ton of use so paying hefty prices for one doesn't make sense. Hoping it makes a fine portrait lens.

I love the depth of field and subject isolation I can get on my oly 45mm. How would this lens compare? I know it doesn't open as wide but would the focal length make up the difference?

DOF on APS-C with 60/2.8 will be practically the same as 45/1.8 on MFT (within an inch at about 8 ft).

Direct link | Posted on May 2, 2013 at 15:17 UTC
In reply to:

tkpenalty: Sigma needs to basically release a full set of lenses for the NEX line... just because Sony isn't.

Well, Sony has:
16/2.8
20/2.8
24/1.8
30/3.5
35/1.8
50/1.8
And an 85mm prime scheduled for launch this year. That would practically cover a FF equivalent 24mm to 135mm.

Then add Zeiss (12/2.8, 32/1.8 and 50/2.8), Sigma (19/2.8, 30/2.8 and 60/2.8) and Samyang lenses (which is also expected to announce AF lenses for E-mount this year).

Zooms: 10-18, 16-50, 18-55, 55-200, 18-200.

Direct link | Posted on May 2, 2013 at 13:47 UTC
In reply to:

peevee1: Olympus, Fuji and Samsung already have slow 60 mm primes, all macro to add. A product manager of Sigma who decided to make the FL for mirrorless should be fired.
All the systems lack cheap f/2.8 and faster ZOOMs though. m43 has a pair, but they are too expensive, others have nothing.

I picked up Sigma 70mm f/2.8 macro for $350. It is an excellent lens, however, for more serious macro, I would rather get 90mm+ focal length.

In that regard, this Sigma 60/2.8 is appealing as a portrait lens. For NEX, it will have to compete with a very good 50mm/1.8, however. The price on the Sigma is great. And if the optical qualities match the 19mm and 30mm lenses, we're looking at perhaps the best trio for value and quality.

Direct link | Posted on May 2, 2013 at 13:42 UTC
In reply to:

Stacey_K: I find it comical when a camera system has a slew of amazing zooms, people complain "where are the primes? All I want are prime lenses." So them a camera system comes out with a bunch of nice primes and people bitch "We want zooms" lol

As I grow into photography, I'm appreciating primes more. As a novice, I did favor zoom lenses more although they also make more sense to those with limited budget. However, this trio (19, 30 and 60) from Sigma is very impressive, more so for the relatively low price tag on all of them.

Direct link | Posted on May 2, 2013 at 13:34 UTC
In reply to:

ZhanMInG12: No aperture ring and dof scale on the e-mount version. AF simply isn't necessary for something with an 18mm FOV, you can zone focus wide open and after f5.6 it's just point and shoot.

But, zone focusing isn't about accurate focus either, it is about acceptable focus. Far more accurate focusing can be achieved via Focus Peaking (and since Sony E-mount system allows Live DOF, you will see "the zone" highlighted).

Direct link | Posted on May 1, 2013 at 13:56 UTC
In reply to:

peevee1: So no stabilization on either?

1/20s is possible under very low, indoor light. But then, with only 12mm for focal length, that isn't an issue at all.

Direct link | Posted on May 1, 2013 at 13:54 UTC
In reply to:

HBowman: Touit is about the dumbest name I’ve ever heard for a lens line. Why not tweet or trout ... wtf ??!!

That is because you don't know what it means. Your name has a meaning and can be distorted as well.

Direct link | Posted on May 1, 2013 at 13:45 UTC
In reply to:

wayfarers: No DOF scale for zone focusing? The first ever in a prime lens in this price bracket?

Use Focus Peaking for the purpose.

Direct link | Posted on May 1, 2013 at 02:34 UTC
In reply to:

DotCom Editor: Call me a skeptic, but I don't believe this for a second.

The parcel's camera always seems to have a perfectly unobstructed view. The camera is never facing down. The box is never in the middle of a stack of other boxes. The lighting is always perfect. The parcel is never in the dark. The white balance is always perfect regardless of whether the parcel is in a warehouse, in a truck (lorry), or outside in the sunshine. The direction of motion is always in the direction toward which the lens is pointing -- moving forward. And on and on...

"The timer circuit was set to make a 3 second video every minute and make longer videos while the box was moving"

Direct link | Posted on Apr 19, 2013 at 13:21 UTC
In reply to:

DotCom Editor: Call me a skeptic, but I don't believe this for a second.

The parcel's camera always seems to have a perfectly unobstructed view. The camera is never facing down. The box is never in the middle of a stack of other boxes. The lighting is always perfect. The parcel is never in the dark. The white balance is always perfect regardless of whether the parcel is in a warehouse, in a truck (lorry), or outside in the sunshine. The direction of motion is always in the direction toward which the lens is pointing -- moving forward. And on and on...

Plenty of video is edited out. There're a few instances where you can see that, and there would be no point in showing "nothing".

Direct link | Posted on Apr 19, 2013 at 02:21 UTC
In reply to:

yabokkie: I have a problem with the word "super-fast". it isn't. this lens is an equivalent of 24.6-53.7mm f/2.8 on Nikon and Sony APS-Cs. it's just as fast as an f/2.8 zoom on 35mm format.

p.s., it's a 25.8-56.4mm f/2.9 on Canon APS-Cs.
the real range and f-number may be different that we will likely have a slightly narrower range and less fast zoom.

yabokkie's last straw is that he/she wants to ignore ISO as affecting exposure.

Direct link | Posted on Apr 18, 2013 at 17:58 UTC
In reply to:

yabokkie: I have a problem with the word "super-fast". it isn't. this lens is an equivalent of 24.6-53.7mm f/2.8 on Nikon and Sony APS-Cs. it's just as fast as an f/2.8 zoom on 35mm format.

p.s., it's a 25.8-56.4mm f/2.9 on Canon APS-Cs.
the real range and f-number may be different that we will likely have a slightly narrower range and less fast zoom.

> we are talking about shutter speed when taking photographs

You "were", until your ideas turned out to be mere assumptions.

Direct link | Posted on Apr 18, 2013 at 17:26 UTC
In reply to:

yabokkie: I have a problem with the word "super-fast". it isn't. this lens is an equivalent of 24.6-53.7mm f/2.8 on Nikon and Sony APS-Cs. it's just as fast as an f/2.8 zoom on 35mm format.

p.s., it's a 25.8-56.4mm f/2.9 on Canon APS-Cs.
the real range and f-number may be different that we will likely have a slightly narrower range and less fast zoom.

> so you get that fast speed at lower image quality?

At least now you're getting over "exposure" issues to IQ issues. But, APS-C and FF aren't that far apart in those terms, especially when you're willing to compromise IQ on FF just so that you can match the exposure with APS-C.

Direct link | Posted on Apr 18, 2013 at 17:08 UTC
In reply to:

yabokkie: I have a problem with the word "super-fast". it isn't. this lens is an equivalent of 24.6-53.7mm f/2.8 on Nikon and Sony APS-Cs. it's just as fast as an f/2.8 zoom on 35mm format.

p.s., it's a 25.8-56.4mm f/2.9 on Canon APS-Cs.
the real range and f-number may be different that we will likely have a slightly narrower range and less fast zoom.

>I would like to comfirm that since same ISO doesn't get same image quality on different format

You're making the same excuse that another person did below. By assuming you can bump up the ISO on FF, what you're really acknowledging a flaw in your assumptions. You're bumping exposure and then claiming that as long as we ignore the ISO used, we've established "equivalence".

Direct link | Posted on Apr 18, 2013 at 16:55 UTC
In reply to:

yabokkie: I have a problem with the word "super-fast". it isn't. this lens is an equivalent of 24.6-53.7mm f/2.8 on Nikon and Sony APS-Cs. it's just as fast as an f/2.8 zoom on 35mm format.

p.s., it's a 25.8-56.4mm f/2.9 on Canon APS-Cs.
the real range and f-number may be different that we will likely have a slightly narrower range and less fast zoom.

yabokkie, what exactly is exposure based on? Let us start there.

Direct link | Posted on Apr 18, 2013 at 16:36 UTC
In reply to:

yabokkie: I have a problem with the word "super-fast". it isn't. this lens is an equivalent of 24.6-53.7mm f/2.8 on Nikon and Sony APS-Cs. it's just as fast as an f/2.8 zoom on 35mm format.

p.s., it's a 25.8-56.4mm f/2.9 on Canon APS-Cs.
the real range and f-number may be different that we will likely have a slightly narrower range and less fast zoom.

>it's physically impossible.

An APS-C camera at 18mm f/1.8 will be about a stop faster than a FF at 28mm f/2.8 at same ISO. The DOF and FOV will match, however.

Also consider a FF with 200mm f/2.8. Assume ISO 100, spot metering and a shutter speed of 1/1000s. Next, if the camera allows an APS-C crop mode, do you think the shutter speed will drop? After all, in crop mode, the FOV and DOF will match that of 300mm f/4 on FF.

Direct link | Posted on Apr 18, 2013 at 16:26 UTC
Total: 322, showing: 81 – 100
« First‹ Previous34567Next ›Last »