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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 09 Apr 2010 (Friday) 05:58
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Sigma 17 - 70 or Tamron 17 - 50 2.8!

 
abathingape
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Apr 11, 2010 20:58 |  #16

I've used the sigma 17-70 extensively with both a 7D and 50D. I found it quite soft wide open. I have a 24-70L in my possession right now, and at 3-4x the price here in Canada, I can say that the 17-70 is a great bargain.


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JulieNick
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Apr 11, 2010 21:09 |  #17

I have never used the Tamron. I do own the sigma 17-70 and it's on my camera 99% of the time. It's a great lens. The only downfall it's not a consistent 2.8 and sometimes it does hunt for focus but so didn't the nifty fifty. I bought this from a member on here. HTH


http://www.flickr.com/​photos/27834677@N06/ (external link)
Gear: Canon XTi, Sigma 17-70, Canon 5d classic, Promaster 7500 speed light.

  
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jantzer
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Apr 11, 2010 21:19 |  #18

I just got the 17-50 Tamron several days ago and think it's great. Mine doesn't hunt in low light like others descibe. Maybe it does hunt in near darkness, but not like I read in these reviews. No way would I let that scare you off. And to me I like the build quality and I have a 100-400l. It's not built like a tank like the 100-400l, but to be honest I treat them both like their fragile like you should.


Gear: 5D2, S95, Tamron 28-75, 35L, 135L

  
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doctorA
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Apr 11, 2010 21:43 as a reply to  @ post 9968291 |  #19

I can speak of the one I have (The Tamron 17-50 non vc).
It's a great lens. To me the f2.8 all the way is worth giving up the extra 20mm zoom (but that's only me!!)

And having the 70-300 that you got, I don't think you'll miss the 50-70 range, as it's a very narrow range that can easily be covered by your shooting style.
Good luck


Equipment: Canon 7D, Canon 70-200 f4 IS, Tamron 17-50 f2.8, Sigma 150-500 f5-6.3, Canon EF-S 10-22mm , Canon EF 100mm f/2.8 Macro USM, Canon EF 50mm f1.8 II, Canon EF-S 18-200 IS, Kenko pro 1.4X, Tamron MC7 2X, Canon 580 EXII, Lensbaby composer, and accessory kit

  
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SCOTTinNJ
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Apr 14, 2010 16:53 |  #20

Amfamora wrote in post #9968273 (external link)
After reading reviews and a bit more research I am really leaning towards this.... over the Tamron 2.8. Simply for what I can only justify as a superior build quality from reviews while having the constant 2.8 lens.....

Every review I have read both on and off this site have given it a great wrap with the only slight disadvantage to it being a little soft wide open. Have seen the videos of the Tamrons loose front and it being described as being plasticy and alot less of a solid feel than a compareable Sigma Lens....

I think this one will be the winner :)

I tested both the non-vc tamron and the sigma side by side in the shop and bought the Sigma. Yes, better build quality. Also zooms in the same direction as my other Canon lenses. The macro ability is almost equal, even though Sigma says macro on it.

I ended up selling mine when I got my 5d, but it was a good lens while I had it.


Fuji X-T1

9 | 23 | 50
18-55 | 55-200

  
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johnbachel
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Apr 14, 2010 18:46 |  #21

I've taken some images of an ISO12233 test chart with the Sigma 17-70mm OS. They may be viewed at:

http://picasaweb.googl​e.com/johnbachel/04122​010TestChart# (external link)

The original images can be downloaded from the website.

My conclusions:
at 17mm, f:2.8, the lens is extremely sharp through most of the field, showing some softening in the extreme corners.

At 70mm, the lens is less sharp at maximum aperture (f:4.0), though still sharp enough to be useful.
At 70mm, f:5.6 the lens is sharper, though not as sharp as at 17mm.

I'll take some more images as I get time and post them. I also have a Sigma 18-125mm OS, which not surprisingly does not do as well, based on images I took with my 40D. Once I've had a chance to take some images of the test chart with the 18-125mm on the 50D, I'll post those as well.


John

_______________

Equipment: 50D, Sigma 17-70 f:2.8-4 OS, Sigma 70-300 OS, Metz Mecablitz 48 AF-1 strobe.

  
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Trique ­ Daddi
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Apr 14, 2010 22:48 |  #22

I have owned both. I had a sharp copy of the Sigma 17-70mm and got good resluts with it. I did get tired of the varible aperture and sold it. I replaced it with the Tamron 17-50mm and have never been sorry. The minimal loss of focal length is the equivalent of moving a couple of steps closer. I much prefer the Tamron.

I really don't think you can go wrong with either one!

Happy Shopping.


Canon 7DMKII,7D 40D, 20D, CANON 100-400mm IS 4.5/5.6L, Canon 70-200mm 2.8L, Canon 50mm 1.8, Canon 100mm 2.8 macro, Kenko Extension Tubes, Sigma 17-50mm F2.8 EX DC OS, 580EX II Flash,Gittos MH 5580 monopod, Thinktank Airport Takeoff.

  
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gcogger
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Apr 15, 2010 01:46 |  #23

Trique Daddi wrote in post #9997559 (external link)
I have owned both. I had a sharp copy of the Sigma 17-70mm and got good resluts with it. I did get tired of the varible aperture and sold it. I replaced it with the Tamron 17-50mm and have never been sorry. The minimal loss of focal length is the equivalent of moving a couple of steps closer. I much prefer the Tamron.

Or a couple of miles closer (or more), depending on what you're taking a photo of...


Graeme
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soko
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Apr 15, 2010 02:38 |  #24

I replaced the 17-70 with the Sig 18-50 f/2.8. I needed the 2.8 but didn't expect a great deal of IQ difference as I had been happy with the 17-70 as a great walk around lens. My 18-50 is a litte sharper at all comparable apertures and focal lengths except at 35mm where the 17-70 had a slight advantage - more correctly, the 18-50 has a slight weakness here. The 17 is noticeably wider than 18 (some claim closer to 19) but I prefer the better sharpness of the 18-50 at this focal length. The 18-50 focusses faster and more reliably in low light.

I agonised between Tamron 17-50 (non-VC) and Sigma 18-50. My take on reviews was that Tammy was sharper but Sig autofocus performed better in low light (some claim it is good but enough others have noted issues). Doesn't matter how sharp the glass is, spot on focus makes a bigger difference (I was fuming when I had to get the Sig calibrated on my 40D but now it is excellent) and low light is what I wanted it for. Tammy spins the Nikon way - may be OK for others but would annoy me if all else was equal. In the end, it was a hip pocket decision - I had some 72mm filters and the Tammy was 67mm.

If you look at any reviews of the Sig f/2.8 18-50, make sure they are not for the first 67mm version (no "Macro" in name) as the Tammy beat this hands down. Also some earlier posts in this thread seem to confuse the Sig with variable aperture versions.

Paul




  
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gcogger
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Apr 15, 2010 05:35 |  #25

soko wrote in post #9998392 (external link)
If you look at any reviews of the Sig f/2.8 18-50, make sure they are not for the first 67mm version (no "Macro" in name) as the Tammy beat this hands down.

The earlier version might be a good second hand option if one shows up at a good price. I owned one at the same time as the Tamron 17-50 and there was hardly any difference between them. On some comparison shots the Tamron was sharper, but on some the Sigma was sharper. I believe it depended on the subject distance more than anything. I kept the Tamron purely for the extra 1mm at the wide end.


Graeme
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Trique ­ Daddi
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Apr 15, 2010 08:36 |  #26

[Or a couple of miles closer (or more), depending on what you're taking a photo of...
_______________

You are correct and that is when I would change lenses. My point was that I use it for widthe not length and that the varible aperture on the Sigma was a drawback for me. The Sigma was great in all other areas.


Canon 7DMKII,7D 40D, 20D, CANON 100-400mm IS 4.5/5.6L, Canon 70-200mm 2.8L, Canon 50mm 1.8, Canon 100mm 2.8 macro, Kenko Extension Tubes, Sigma 17-50mm F2.8 EX DC OS, 580EX II Flash,Gittos MH 5580 monopod, Thinktank Airport Takeoff.

  
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rjx
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Apr 15, 2010 09:45 |  #27

I came very close to buying the 17-70 OS (cause I had a sigma 10% code) but decided against it because I really want to keep my lens collection with apertures that don't vary throughout the focal range. So that's why I plan to buy the 17-50, and it's constant 2.8! That's more valuable to me than the extra 20mm.


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“Photos are everywhere. You just have to know how to look.”

  
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aboss3
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Apr 15, 2010 11:48 |  #28
bannedPermanent ban

Go for Tamron and you won't be disappointed. If you're looking for more range, consider 28-75 as well.


Gear | My gear is changing faster than I can update the signature
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organicimagery
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May 16, 2010 13:54 |  #29

MMMM decisions decisions


Canon 50d, Canon 50m 1.8,Sigma 17-70 HSM,Manfroto modo, Lowepro mini trekker

  
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May 23, 2010 10:06 |  #30

I cant find a uk store yet with this in stock
so my 50d is still in the box grrr


Canon 50d, Canon 50m 1.8,Sigma 17-70 HSM,Manfroto modo, Lowepro mini trekker

  
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Sigma 17 - 70 or Tamron 17 - 50 2.8!
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