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Wide Angle Dilema

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#1 matt215


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Posted 19 May 2012 - 09:39 AM

Ok I've got a 5d mark 2 (full frame sensor) and a 7d (cropped sensor). Would it be better to use the 5d with full frame and a17-40 or 15 mm fisheye, OR use the tokinab10-17 fisheye on the cropped sensor 7d? I've just heard so many good things about the tokens lens that it might be the way to go.

Canon 5D mk2, Ikelite housing, Ikelite 125 strobes, 17-40 mm 4.0 L, 100 mm, 24-150 mm L, 100-400 mm 5.6 L


#2 Drew


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Posted 19 May 2012 - 03:41 PM

It really depends on what you are shooting. The tokina is nice but not so great if you want a rectilinear look. 17-40 is very good but sometimes isn't wide enough.
I personally like the Sigma 8-16 on the Canon crops. Awesome rectilinear lens that does better than it's bigger FF brother 12-24, which is soft on FF cameras.

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#3 divegypsy


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Posted 19 May 2012 - 03:45 PM

Matt, Take a look at Udo's pictures comparing the Tokina fisheye zoom to cropped images taken with the Sigma 15mm f2.8 on a full frame sensor camera and then cropped to provide the same overall picture. They are on page 3 of the D800 review. They give you some pretty clear evidence on which to make your choice.


#4 fish


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Posted 22 May 2012 - 07:57 AM

Mark, I have the same set up as you. That is the 5D mk II and the 17-40mm as well as the fish eye. I find that the corner sharpness is much better the 15mm. The fish eye allows you as well to focus a lot closer to your subject, but I find the focus noticeably slower than on the 17-40mm.

I don't have any experience with the Tokina...

Below are a couple of photos where you can see the corner blur of the 17-40mm (the photo above) and then a picture taken on a second dive with the 15mm showing more sharpness.

Posted Image

Posted Image

Edited by fish, 22 May 2012 - 09:15 AM.


Canon 5D mkII / 17-40mm F4 / 15mm 2.8 / 100mm 2.8 / Ikelite housing and strobe