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Old 22nd of August 2008 (Fri)   #1
pointerDixie214
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Default My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

So, I love my Sigma 24-60mm f/2.8 but I really wanted something wider, and not giving up the f/2.8 was preferred, but not crucial. So I decided on the Tamron 17-50mm f/2.8.

I decided to do a non-scientific comparison between these lenses and write a small review on each with respect to one another. First I will display my images, then I will display my review and conclusions.

I ran a series of tests to compare sharpness, color, and contrast. All images have ZERO pp and are straight from camera with respect to size change and cropping for 100% crops. Each image is labelled above with the lens used and focus point. All images taken WITH the lenses are f/2.8 except for images OF the lenses. Each image was allowed ONE attempt to get it right. This is to insure the lens focuses properly the majority of the time.

Tamron:


Sigma:


Tamron:


Sigma:


Tamron:


Sigma:


Tamron:


Sigma:


These images were to test the colors, contrast, and focusing at closer to medium distance. Results are VERY close, with a slight edge in sharpness, color, and contrast to the Tamron. Although with the exception of the back of the leaf with the Sigma, results were almost indistinguishable.
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Old 22nd of August 2008 (Fri)   #2
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

The Sigma looks good especially for the price. So are you keeping both? I myself was looking at the Sigma just as a lens to own. Would be overlap but that does not matter much to me.
Thanks for the impressions.

EDIT: Sorry about the interception
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Old 22nd of August 2008 (Fri)   #3
pointerDixie214
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

The following tests were to test sharpness and focusing at medium to infinity.

Tamron: Focus on the hose


Sigma: Focus on the hose


Tamron: Hose 100% crop


Sigma: Hose 100% crop


Tamron: Mirror


Sigma: Mirror


Tamron: Mirror 100% crop


Sigma: Mirror 100% crop


These results were close as well with the Sigma being a touch more sharp at infinity on the hose and the Tamron being a little sharper on the mirror at about 30 feet. Colors and contrast are very similar so I call this a tie.

Continued...
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Old 22nd of August 2008 (Fri)   #4
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

This was to test the abilities to focus, sharpness, and colors and contrast at the long end, wide open, at about 15 feet.

Tamron:


Sigma:


Tamron 100% crop:


Sigma 100% crop:


This test was to show the difference in the focal lengths of each lens. The Tamron wins leaps and bounds on the wide end. On the long end the results are much closer with the advantage to the Sigma. This is kind of a "Duh" test since you know the difference in focal lengths, but it helps me to have a visual with it... again, all taken wide open at f/2.8...

Tamron 17mm


Sigma 24mm


Tamron 50mm


Sigma 60mm
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Old 22nd of August 2008 (Fri)   #5
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

This was a focus test to determine focusing up close, at f/2.8.

Tamron:


Sigma:


Tamron: 100%


Sigma: 100%



As you can see both focus accurately in medium light, and both are very sharp wide open.

These images are to give you a comparison in size. Both are very well built, with the Sigma having a better build. The Sigma's zoom ring rotates the same as a Canon lens, where-as the Tamron is the opposite. The Tamron's zoom ring moves more fluidly than the Sigma's, and neither show any signs of zoom creep.





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Old 22nd of August 2008 (Fri)   #6
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

Now for focusing... Neither if these lenses have an HSM, USM, or similar technology so focusing is not super fast, nor is it super quiet. But I see people ask all the time HOW loud they are. So I took a video with sound or each one. This also shows the speed as the focus from their minimum focus distance, all the way to infinity. The Tamron does focus a bit quicker than the Sigma. The Sigma does focus a bit quieter than the Tamron. This will mean it depends on your uses as to which one wins. Shooting moving objects where sounds isn't a factor, the Tamron wins fairly handily. Shooting slower moving objects where you want to be a bit more quiet, the Sigma wins slightly. Although both are loud enough I wouldn't use them in, say, a wedding. Another note, as you can see, they both focus internally, so the front unit neither rotates, or extends upon focusing. Great for using a CPL!

Here is the Tamron focusing (and you can see it mounted on my 30D)


Here is the Sigma focusing (and you can see it mount on my 30D)


So...
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Last edited by pointerDixie214 : 22nd of August 2008 (Fri) at 15:07.
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Old 22nd of August 2008 (Fri)   #7
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

So, which one is better? This is tough. I think all around the Tamron has a very slight edge on the Sigma. However, the Tamron was quite a bit more expensive than the Sigma.

For BOKEH- I would give this award to the Tamron. They are both great, and the Sigma will put the BG OOF more than the Tamron, but the Tamron's just seems a bit more please to me for some reason...

The Sigma did have to get sent off for front focusing issues when I got it. As you can see, it functions fine now.

Either of these lenses is a HUGE step over the 18-55mm or 18-55mm IS kits. Sharper, better colors, faster focus, MUCH better build, the list goes on. I am thinking about keeping both. I imagine I will use the Tamron much more often, however, as the focal range on the Sigma isn't wide enough on a crop cam for my liking.

Bottom line- these are both high quality lenses. The Sigma cannot be beaten by any lenses below $400. I say based on this, the Sigma is the better bang for your buck by a mile. The Tamron is the better lens overall if you have the money or need wide angle.

I hope this helps!!!!
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Last edited by pointerDixie214 : 27th of August 2008 (Wed) at 09:14.
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Old 22nd of August 2008 (Fri)   #8
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

thanks for the review, I am seriously considering ordering the Tamron, and this helped a lot. I think with a 40D the Tamron's wider FOV will come in handy.
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Old 22nd of August 2008 (Fri)   #9
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

you forget one thing, the sigma can be used on a FF camera as well. the ultimate budget walk around for either a 1d or 5d. Thanks for the comparo, i have the sigma 18-50 2.8 macro, and just ordered a 24-60 2.8 for an upcoming 1d series cam. I plan on keeping both and will do the same test. the macro for the 40d's and 24-60 for my 1dmkii
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Old 22nd of August 2008 (Fri)   #10
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

I agree. From a quality standpoint there is not much difference in these lenses. From a usability standpoint, if you use a crop cam, the Tamron wins hands down.

OH! I forgot to mention. The Sigma works on crop and FF. The Tamron ONLY works on crops...
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Old 22nd of August 2008 (Fri)   #11
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

WOO-HOO! Convinced the boss (wife) to let me keep them both!

May sell the Sigma after a month or so of playing with them both, but for now I get to play with both!
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Old 25th of August 2008 (Mon)   #12
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

So, after using the Tamron a few times now I can easily say that it is my favorite standard zoom lens I have had so far. (Canon EF-S 18-55mm IS, and the two tested here). I have gotten some great results with the Sigma, but I never had the confidence in the Sigma that I do in this lens. This thing is every bit as sharp at f/2.8 as my 70-200mm L is at f/4.

Here's some from today. Not the best photos, but TACK sharp in the high res files...











100% crop of above




All of these at f/2.8...
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Old 25th of August 2008 (Mon)   #13
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

Here's a couple from yesterday with the Tammy...














So, my verdict is that I now really like the Tammy more. So I still say Tamron is better overall. Sigma is still better bang for your buck...
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Old 26th of August 2008 (Tue)   #14
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

Hmm, this is an interesting comparison and very well done. I was debating between these two lenses myself, and since I already have an UWA Sigma 10-20mm (which I love) I figured the 24-60 would pair up nicely. Seeing these photos reaffirmed my decision, I will be quite happy if I get a copy with the same sharpness you have demonstrated. I also find it interesting to see how much the focal length on the wide end affected the DOF, which to me made the Sigma shots look much nicer. The one thing I really think the Tamron dominates the Sigma in though is color and contrast, all the photos have great color on the Tamron shots and I can see why you are really happy with it, both lenses look great, and you can't really go wrong with either by the looks of it. Can't wait for my 24-60mm to get here (hopefully get it by friday!)
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Old 26th of August 2008 (Tue)   #15
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Default Re: My Comparison: Sigma 24-60mm f/2.8 vs. Tamron 17-50mm f/2.8

Only one note...shooting ONCE isn't a valid test to determine if the lenses will reliably focus correctly 'the majority' of the time....randomly (tho not so randomly of course), yes, majority, no. For that you'd need a number of samples larger than 2, and preferrably enough to eliminate extra-ordinary attempts (to discount outliers, unaccountable error)...it's late...it's just late night chatter...forgive me...but when I shoot at F2.8 (F4/wide open) I don't expect 100% accuracy, whether MF or AF (and I'm sometimes more confident shooting MF when wide open!)...I'm happy with 50-67% correct focus if the subject is at all moving, maybe 90% if not (the unaccountable error lying within me, somewhere), and I'm looking to be happy with maybe a third of those (in terms of content)...
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