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New Sigma 1770DC v Canon 1785IS

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Yesterday I bought a Sigma 17-70mm. I have a Sigma 18-50mm f2.8 and a Sigma 18-125mm.

The Sigma 17-70mm is a perfect walkaround lens for me. I hardly use the range 70-125mm. The Sigma 18-50mm f2.8 has a range which is a little too short.

What strikes me about this new Sigma is the focussing. With the other two lenses I always use the zoom lock technique, but that is not necessary the new Sigma 17-70mm as it is always dead on, even at 17mm.

With the macro capabilities it is a very versatile lens with a super range.
fStopJojo said:
just posted at my site some test shots:
http://www.pbase.com/fstopjojo/17701785

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http://www.pbase.com/fstopjojo/lenstests
Click to expand...
 
Do you agree with OP (fStopMojo) observations that 17-70 holds its own in this respect compared to 18-50 EX?

I'm sitting on a fence trying to decide if it's worth reolacing my 18-50 with 17-70. I miss that 50-70 range and 1:2 macro could be also nice. But on the other hand I'm addicted to 18-50 optical qualities despite questionable AF.
Hythloday said:
The Sigma 17-70mm is a perfect walkaround lens for me. I hardly use
the range 70-125mm. The Sigma 18-50mm f2.8 has a range which is a
little too short.

What strikes me about this new Sigma is the focussing. With the
other two lenses I always use the zoom lock technique, but that is
not necessary the new Sigma 17-70mm as it is always dead on, even
at 17mm.

With the macro capabilities it is a very versatile lens with a
super range.
fStopJojo said:
just posted at my site some test shots:
http://www.pbase.com/fstopjojo/17701785

--
http://www.pbase.com/fstopjojo/lenstests
Click to expand...
Click to expand...
--
http://www.pbase.com/klopus
 
tapir said:
Do you agree with OP (fStopMojo) observations that 17-70 holds its
own in this respect compared to 18-50 EX?
Click to expand...
I bought it yesterday and I took two sets of test pictures to have them calibrated by Thomas Niemann. I feel sharpness is ok. It has an EX design.
tapir said:
I'm sitting on a fence trying to decide if it's worth reolacing my
18-50 with 17-70. I miss that 50-70 range and 1:2 macro could be
also nice. But on the other hand I'm addicted to 18-50 optical
qualities despite questionable AF.
Click to expand...
I missed the 17mm and the 50-70mm range. I do have the Tokina 12-24mm. The Sigma 17-70mm has an impressive range with nice macro capabilities. A very good walkaround lens.
tapir said:
Hythloday said:
The Sigma 17-70mm is a perfect walkaround lens for me. I hardly use
the range 70-125mm. The Sigma 18-50mm f2.8 has a range which is a
little too short.

What strikes me about this new Sigma is the focussing. With the
other two lenses I always use the zoom lock technique, but that is
not necessary the new Sigma 17-70mm as it is always dead on, even
at 17mm.

With the macro capabilities it is a very versatile lens with a
super range.
fStopJojo said:
just posted at my site some test shots:
http://www.pbase.com/fstopjojo/17701785

--
http://www.pbase.com/fstopjojo/lenstests
Click to expand...
Click to expand...
--
http://www.pbase.com/klopus
Click to expand...
 
Hi, I also would like to buy this lens. Do you have any image taken with it? I looked in other threads but mostly found macro shots (which seem nice) but I would like to see "normal" subjects or landscapes or whatever. Thank You very much
 
Yes...I already know ftopjojo's pages almost by heart, but I read that some people here have bought it recently and I was asking if someone could post any of their shots. thank you anyway.
 
Just received a UPS package from B&H so don't expect any pics for now especially outdoors one. Just took few pics inoors of focusing charts and a row of AA batteries to mae sure that AF is fine (had bad prior experience with 2 copies of 18-50 EX). Everything is fine.

1st impressions vs 18-50 EX:
  • Similar build and feel with EX signature finish. A little shorter and lacks cool EX gold ring. Hood same as 18-50 (very nice).
  • Still build wise EX feels just a tiny bit better: focus ring is a tad better dumpened (17-70 feels kinda free wheeling), internal barrel on 17-70 is plain plastic (no nice finish) and not a single peice (2 parts but nothing is woobling). In any case 17-70 feels better built than something like EF 28-135 IS or 17-85 IS.
  • On XT (One Dhot, Central AF point) focuses pretty well in a dimly lit room even at 70mm and f4.5. At same scene 18-50 hunted longer at 50mm at both f2.8 and f4.5
  • AF speed and noise (though not precision) under low home lights seem similar to 18-50 EX meaning not great compared to USM but accpetable.
  • Judging by some closeups at 50mm f4.5 sharpness seems similar to 18-50 with the same settings and same distance (half a meter).
  • Overal color tone on 17-70 looks more neutral compared to warmer 18-50. But take this with a grain of salt since I was shooting under home incandecent lights using respective AWB preset.
  • Macros come out nice and sharp and indeed are all the fun others were raving about.
  • Shooting indoors lack of f2.8 at tele was sorely missed (had to jack ISO all the way up to 1600 to compensate).
That's it for now. In few days I'm taking 17-70 on vaccation from Siberish NYC to the sunny Carribean where it'll get real outdoors test. Maybe before that I'll manage to make some product shots with my studio lights and will post them.

For now 17-70 feels like a winner for travel and stuff. If all goes well it'll be hard to part with constant f2.8 on 18-50 and IS on 28-135 but looks like both are destined for eBay to be replaced by 70-300 IS.

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http://www.pbase.com/klopus
 
hy, I have a question about the lens hood - will I be able to put 77mm circular polarizer ( with step up ring 72-77) and the including lens hood, or do I need to buy a diffrent lens hood separately?

Thanks....
 
valius said:
hy, I have a question about the lens hood - will I be able to put
77mm circular polarizer ( with step up ring 72-77) and the
including lens hood, or do I need to buy a diffrent lens hood
separately?

Thanks....
Click to expand...
72mm polarizer that I have fits well under the hood but already quite snag. I doubt about 77mm with step-up but you'll have to try it yourself.

--
http://www.pbase.com/klopus
 
Hi,

this sure looks like a fine lens to me. However, I plan to use it on my EOS 10D and the guy at my local shop told me it won't fit because the 10D is not compatible with EF-S type lenses (that's why the Canon is out of the question for me). However, I can't find any confirmation on this anywhere.

Has anyone successfully used this Sigma lens on the EOS 10D?

Thanks!

--
Hey, no signature?
 
Your dealer does not understand the difference between Canon EF-S lenses and Sigma DC lenses, which will fit any EF mount, but will vignette on cameras that do not have a multiplier of at least 1.5

All the Sigma DC lenses will work fine with your 10D, while none of the Canon EF-S lenses will

John
 
Hi John,

thanks for your reply. That's exactly what I thought, but when the dealer tells otherwise, 'one starts to have some doubts' (he should be the one to know, right? I valued this dealer greatly, hmmmm).

I already thought it strange I couldn't find any confirmation on this matter in any of the reviews and product specs.

Thanks again!
John Bacon-Shone said:
Your dealer does not understand the difference between Canon EF-S
lenses and Sigma DC lenses, which will fit any EF mount, but will
vignette on cameras that do not have a multiplier of at least 1.5

All the Sigma DC lenses will work fine with your 10D, while none of
the Canon EF-S lenses will

John
Click to expand...
--
Hey, no signature?
 
Appie said:
thanks for your reply. That's exactly what I thought, but when the
dealer tells otherwise, 'one starts to have some doubts' (he should
be the one to know, right? I valued this dealer greatly, hmmmm).

I already thought it strange I couldn't find any confirmation on
this matter in any of the reviews and product specs.

Thanks again!
John Bacon-Shone said:
Your dealer does not understand the difference between Canon EF-S
lenses and Sigma DC lenses, which will fit any EF mount, but will
vignette on cameras that do not have a multiplier of at least 1.5

All the Sigma DC lenses will work fine with your 10D, while none of
the Canon EF-S lenses will

John
Click to expand...
--
Hey, no signature?
Click to expand...
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http://www.pbase.com/mariush
 
As promised here're few samples that I took on vaccation with my brand new 17-70 mounted on XT. Most photos were taken with polarizer, intentionally underxposed with negative EV to preserve highlights and developed from RAW by Bibble Pro. Some were quite quite heavily touched by Photoshop (mostly selective color play, curves and cropping). Still I guess even resized pics can reveal some lens capabalities. If you're ineterested email me and I'll upload original CR2 files if you tell me which ones.

To sum up I have mixed feelings about 17-70 vs 18-60 EX which I also have. Now I'm not so sure which one will go to eBay or KEH.

On one hand I'm very happy with lens sharpness and contrast rivaling 18-50 EX or 50 f1.8 at wide angle even at f2.8. Closeup abilities are really indispensible and add a lot of versatility for walaround/travel lens. 17-70 range is also very handy for travel as well as compact size/weight.

On the other hand my copy at 50-70mm is a little dissapointing both in shrapness and in AF. In this range my 28-135 IS is better. At 50mm 18-50 EX beats both. On few occasions I missed 18-50 EX constant f2.8 at midrange.

Initially when testing at home I thought that 17-70 AF is way more relieable that that of 18-50 EX. I still think so but real life test still proved that Sigma's SF is no macth for USM. I lost few shots because of mysterious misfocusing (e.g. in VF everything was fine and Canon's RAW task showed proper focus point) but in result focus was off. Of 1K photos this happened only maybe 10 times but still. Also sometimes at tele lens won't focus on low contrast (but stil textured) surfaces even in bright light. Interestengly in most such cases 2nd or 3rd refocusing will lock.

Ok now to samples. Here're full galleries all made with 17-70:

http://www.pbase.com/klopus/san_juan_puert_rico
http://www.pbase.com/klopus/paradise_revisited

Few less processed samples inline:









--
http://www.pbase.com/klopus
 
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