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PostPosted: Tue May 29, 2012 4:06 am 
Hi guys.
I had a chance to test these lenses last Saturday. The body I used was the canon 5d m2. Here are my first impressions. Both lenses are on par with the build quality, Canon may have a slight edge(better weather sealing), but the Tamron felt better in my hands. Sharpness: The Tamron is very very sharp! The Canon is sharp but Tamron has the lead. Contrast: There must have been something wrong with the Canon i tested, or Canon has done this intentionally so people can adjust the contrast later on. Resolution and detail: The Canon is the winner with near twice the resolving power! Auto focus: Tamron is impressive, not super fast, but nails the focus every time. The Canon, was the focus king though, with one exception, the focus was all over the place! I needed to refocus three times on most of the shots for the focus to lock on the subject. Overall, I would buy the Tamron. More than half price less, + VC, oh and i forgot to say, what happened with Canon's bokeh?? All I saw was gausian blur, and there was nothing wrong with the tamron, i've read people complaining about its bokeh... Actually it was one of the best bokehs i've seen on a 24-70mm range lens. I'm getting mine on the 5th next month :)
Hope this helps people decide on which lens to buy, if they had any doubt about the Tamron -Go for it!

P.S. I have only a few sample images (same theme) with both lenses i'll upload them latter on today.

PostPosted: Tue May 29, 2012 10:40 am 

Joined: Sun Aug 29, 2010 11:52 am
Posts: 861
Location: Surrey, UK
The new tamron is certainly an exciting lens. The fact that it is constant 2.8 and has IS on paper makes it a tempting lens. I'm surprised that the tamron is shaper than canons latest 24-70mm since I heard that was meant to be very sharp. I still wish Canon had put IS in their version and for that reason I don't really think there is much competition. Although Tamron lenses have been known for focusing issues in the past so the reliability of the Canon would probably be better.

Camera: Canon 550D with battery grip
Lenses: Canon 24-105mm f/4L, Canon 50mm f1.4, Canon 18-55mm, Tamron 70-300mm,
Accessories: Manfrotto 055XPROB with 808RC4 head, Canon 430ex II speedlite, Lowepro Nova 180AW and Lowepro Pro Runner 450AW

Oh that is so lame, every hot girl who can aim a camera thinks she’s a photographer -Stewie Griffin

PostPosted: Tue May 29, 2012 10:45 am 
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Joined: Tue Jan 06, 2009 9:22 pm
Posts: 1338
Location: Speyer (Germany)
I've heard more about focusing issues with Sigma than with Tamron - and in this case you even get a ring USM with the lens. I'm looking forward to seeing the samples. :)

Canon EOS 500D + Canon EOS 5D Mark III + Canon EOS 33v
Canon EF 28-80mm 3.5-5.6 USM + EF 24-105mm 4L IS USM + EF 100-400mm 4.5-5.6L IS USM + EF 50mm 1.8 II + EF 100mm 2.8L Macro IS USM + Sigma 12-24mm 4.5-5.6 EX DG HSM + Canon Speedlite 580 EX II + Nissin Speedlite Di 466

PostPosted: Tue May 29, 2012 11:20 am 
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Joined: Sun May 25, 2008 12:48 pm
Posts: 8087
Location: UK
The original comments on sharpness and resolution kinda oppose each other. Care to clarify on how each of those are defined in this case?

Canon DSLRs: 7D2, 7D1, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 85/1.8, 135/2+SF, 70-300L, 100-400L, 100L, MP-E 65, EF-S 10-18, 15-85
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 50/1.4A, 150 macro, 120-300 f/2.8 OS
Compacts: Sony HX9V, Fuji X100.

PostPosted: Wed May 30, 2012 4:24 am 
Camera JPEG engine, set to standard. No sort of post-processing. 100% crops. Full image resolution is lowered in photoshop, but the crops are unchanged at full resolution.
Here is the Canon image: ... G_0023.jpg
as you can see the bokeh is a bit wacky
crop at full res.: ... 23crop.jpg
Settings: I shot at 70 mm but the info shows 61mm for some reason... ISO 640. 1/60sec

note: The resolution has automatically been lowered by photobucket and the images look MUCH softer. The images have a blue cast because i forgot my WB trimming On. The Canon's stand was 2-3x brighter than the Tamron's.

The Tamron image: ... G_0012.jpg
crop: ... 12crop.jpg
Settings: ISO 800 1/60sec 70mm

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