Looking for images comparing 16mm to 17mm

Looked around but couldn't find a thread on it already...

I am interested in seeing images of the same subject/composition but taken at 16mm and at 17mm on a full frame. Basically I am wondering what the difference on the wide end of the 16-35mm f/2.8L and the 17-40mm f/4L is as I am kinda stuck between which of these lenses to get. Anyone have both ? Or if anyone knows a good thread or site where this has already been discussed please direct me to that.

No I dont want to turn this into a debate as to which is better, they are both incredible lenses, I just need to know how much wider 16mm really is and am having trouble finding/seeing that anywhere else.

Thanks for your help everyone!

This tool may help: http://www.tamroneurop​e.com/flc.htm

swjim wrote in post #4680884
This tool may help: http://www.tamroneurop​e.com/flc.htm

Wow, that makes the difference look extremely minute... Is the effect at minute when focusing on something closer?

Thank you for the link by the way.

http://www.luminous-landscape.com/reviews/​lenses/16-35.shtml

There's an animated GIF near the top showing the difference between 16mm and 17mm (since the review is comparing against the older 17-35mm f/2.8L lens).

http://www.pbase.com/l​ightrules/fov1

http://www.pbase.com/l​ightrules/fov2

[The lens for 16mm is the Tokina and the 17mm lenses are the Tamron 1750 and Canon 1755.]

Oh, and here are the letter designations:
B = Tokina 16-50 F2.8 AT-X PRO DX
C = Tamron 17-50 F2.8 SP XR Di-II
D = Canon 17-55 F2.8 IS USM

You can also check the specs on Angle of View via http://www.eflens.com for the specific lenses you're thinking about, as it does vary.

Then, if you're a math whiz, you could calculate the answer to your question based upon distance to subject. (I'm not any longer)

Not enough of a differnce for me to give up my ultra sharp and beatifully coloured 17-40 for a soft in the corners Mk.I or an expensive Mk.II

The difference is very small. Don't forget at 17mm the focal length/shutter speed rule makes the F/4 17-40 quite fast. I shoot in low light with my 17-40 all the time. I use it as a night time, no flash, walk around in the city with no problems.