P.O.T.N. Anonymous

Note: If you try this you are on your own and fully responsible for any consequences, good or bad..


Quite reasonable. I recommend partial or spot meter with this one, since evaluative/CW will take into account the corners.

Full AF (including awesome AF ), very fast USM, fully operational stabilizer. BTW, the 17-85 even registers its lens data properly in the EXIF. There is sufficient mirror clearance on a 1D to safely operate this combo even at 17mm where the rear element sticks out the most.

Please "bring your own crop" now that the camera will not do it though Note that because you MUST crop the image (unless you particularly love vignetting), you essentially are getting a 28-135mm FOV, which is the same as 1.6X crop factor. You get 120% viewfinder coverage (no kidding), and almost-like-rangefinder "out of the lens" image coverage to some extent.

Assuming you were crazy enough, you could create your own Photoshop actions or ImageMagick scripts to batch crop, and 'score' the 1D focusing screen with an X-acto knife (if you stuff up, it's only $30? that's the 1D advantage.. but I'm not brave enough to try) to provide framelines in your viewfinder.

I can almost hear nzgl3-user screaming "NUTS, THESE PEOPLE ARE NUTS!" Yes, I am.....it would definitely take nuts (both kinds) to try something like this

What would be awesome if someone was to do this conversion to a 17-55 f/2.8 IS USM, that way 1D shooters would have 2.8 AND IS, with 8.5fps, 45-point AreaAF and then some.

You need to remove the rear baffle:

Which is not that hard.. at least on my lens, the baffle pops in and out with gentle finger pressure. Once removed, the lens becomes effectively an EF mount, although the rear element WILL collide with a full frame mirror - one reason you don't see me using it on my 5D