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 Post subject: Tamron 24-70 for Canon
PostPosted: Tue Jul 10, 2012 8:14 am 
I purchased this lens tonight for 1050$ which i think is Ok.
I didn't do any test shots, as I am extremely tiered and yet i need to go to work in 2 hours 8pm...****ML
I have it mounted at the moment on my 5dm2, and there is heaps of vignetting at 24mm and a bit less at 70mm, as i can see in the viewfinder/live view. Though it goes away at f/11 LoL...
I knew that it would perform like this so no surprise...
In the next days i will give you guys a short review, but don't expect anything professional. If you're interested in the optics performance, maybe you could help me out with the charts and tell me how to use them, and where to download them.


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PostPosted: Tue Jul 10, 2012 9:49 am 
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Joined: Sun Aug 29, 2010 11:52 am
Posts: 861
Location: Surrey, UK
I'm guessing this is the new version with VC? I'm keeping an eye out for all reviews of this lens as I would like a 24-70mm with IS. Seems to be a few problems with this lens but from what I have heard in general the VC is very good and it performs quite well optically, especially for the money!

_________________
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


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PostPosted: Tue Jul 10, 2012 2:55 pm 
Yes it has VC. The non VC version is the 28-75mm f/2.8.
One weird thing is that the VC when switched on in live view is constantly working. Even if not filming.
It's louder than the Canon 18-55 kit lens, which can't be actually heard anyway...
But it's quiet enough for filming, it makes a very cool sound if you put your ear on the lens like a airliner cruising :D hahah
In a few days i will post some brick wall images for sharpness and distorsions, and if any of you more sophisticated photographers know how to use the complex charts let me know, so I can provide you with better feedback on this lens. Thanks


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PostPosted: Tue Jul 10, 2012 4:17 pm 
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Joined: Sun Aug 29, 2010 11:52 am
Posts: 861
Location: Surrey, UK
I look forward to seeing some images and your overall opinion of the lens if you have time :D

_________________
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


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PostPosted: Wed Jul 11, 2012 9:02 am 
James, yes there are problems with every lens. But it doesn't mean you will encounter them even if they are present. You use the lens for landscape, but never shoot architecture, so how would you encounter the distortions?(If the lens doesn't have super barrel distortion, like a fisheye..)
I can't comment on any issues yet, i just shot the boring brick wall images, and some images random snap shots.

This lens has perfect balance on the 5dm2. On Canon rebels the weight is leaning forwards, but balance can be improved with the use of a battery grip. Build quality is good. Plastic body build, feels like 100mm macro canon USM (NO IS). I would categorise this as Polycarbonate plastic like the one used in mobile phones/camcorders, with some extra support(mainly to the glass inside it). If I'd accidentally drop it on a soft surface(grass), I believe it would withstand the impact, but what will happen to the electronics inside...I don't want to know :) If i'd drop it on gravel I see the plastic scratched, eventually cracked. The height of the fall is about 1.5-1.7 meters. Higher than this or a more solid surface => bye bye lens :)
The 18-55 kit lens would be more resistant to impact due to it's lighter weight and plastic/elastic construction.
However this is just an assumption for a worst case scenario. It really depends on the angle it falls, which part first hits the ground etc...
Focusing rings: As a Canon user, It doesn't really bother me that the focus ring is towards the body. I thought that it wouldn't be a problem having the zoom ring to "zoom in" by turning to the right, and "zooming out" the opposite way. I hear this is the Nikon way. However, I need to get used to it, it seems unnatural. If you ask me which way you need to turn the zoom ring on your canon lens? - I wouldn't know, but i guess i have this stored in my subconsciousness and it really can be bothersome with the Tamron.
The rubber used on the rings is a bit slippery(Maybe this is just my fingers). The focus ring could have been wider. The 88mm diameter of the filter thread is too wide for my hands(I suppose this is roughly the width of the lens barrel too). I have medium/normal sized hands, but i find stretching my fingers too much when zooming/focusing and it is a bit uncomfortable, but nothing to worry about that much.
Since the rings are a bit wide, if you are filming you cant perform a very smooth focus/zoom by hand.
The movement of the focus ring is ~90-95 degrees with medium resistance and the zoom ring movement is ~70 degrees with high resistance. It is good that you wont accidentally change the focal length(there is also a lock button), but bad when you do want to move the ring, because you don't know where the 24/70mm setting is since you need to apply more force, and you can be worried of applying too much force.
Fortunately the lens extends the proper way (Unlike Canon's 24-70) and everything seems to be tightly assembled.
All test shots are done with a 5dm2 with mirror lockup, iso 100, aperture mode, standard colour profile VC is off, manual focus in live view. I used a flimsy tripod, and the light conditions aren't perfect. I work at night, sleep late, and 5PM- 7PM is the only time I can do test shots. I live on the southern hemisphere it's winter here, so not enough light for the shots at f/4>( I will redo them). There Is some vibration due to the wind.
I think my lens is front focusing but i will get that fixed this weekend when i take some real life sample images.
For me, the colours of this lens are Superb, punchy & contrasty, and i love the bokeh no matter some people complain about it. I have tested the new 24-70 Canon m2, and the Tamron clearly performs better, with a more blurry bokeh. Some may disagree, i'm just having a say on my opinion.

I will just upload the images at f/2.8 and f/4 and will retake the others, since there is blur caused by shake, and the shutter speed at f/11 reaches 1/6 sec.
Feel free to comment the images. I do see wavy barrel distortion at 24mm and vignetting at all focal lengths.
There is no visible purple fringing.

I will keep you updated on focus speed and the rest. I need to get ready for work, and i still haven't even uploaded the sample images. Feel free to download them, all exif data is included....
... Now where do i upload them lol :D
Ok, I'm creating a Flikr account now.. BOOORRRIIINGGG
...Uploading 10 images.
12%...13.....
I can't play Dota, because of the upload, and i really need that game it's my addiction :D
Whatever... I don't care if i'm late for work. Must play DOTA hahah :D
25%....
76%...
I'm having so much lag, 200> ms ping :D
81%
All done :)
http://www.flickr.com/photos/22285064@N03
enjoy ;)


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