Using an EF-S 10-22 on a EOS 1D3

[Ross Becker]

Ever since I replaced my EOS 5 film camera with the 10D (1.6 crop), I've really missed getting wide. Better now I have a 1D3 but still my 20-35 f2.8L isn't really wide enough. And I can't afford a 14L (and in combination with the 1D3 gives a horizontal angle of view(HAV) of 86 deg) so research showed that I could use a EF-S 10-22 by modifying the lens plastic base. It's been done here.
So I bit the bullet & bought a 10-22, removed the plastic base, modified a base from an old EF lens & installed it on the 10-22.
It's fantastic. Can't go wider than 11mm or else the mirror hits the rear lens element & you get corner cutoff wider than 12mm. So I've installed limiters so 12mm is mechanical limit. This gives a HAV of 100 degrees.

There are some pics of what I did here:
1st pic is the underside of the "new" base showing the limit lugs that stop the lens going wider than 12mm.
2nd pic is the "new" base installed on the lens
3rd pic is the lens as bought.
4th pic is the 10-22 on my 1D3.

I found that there was a a slight occlusion in the bottom right hand corner at 12mm & determined that it was the lenshood that was interfering. So I ground about 0.5mm off the hood at the corners & that's now fixed.

There's a gallery of images taken with the 10-22 on the 1D3 here.

[Ron Metz]

Ross,

FANTASTIC!! I can now sell my 40D. Thanks for sharing.

Ron

[Ross Becker]

Ron,
I posted about this on DPReview last week & there's quite a few questions and answers there.
You can follow that discussion here.

[michaelnotar]

very fun... sounds like somethink i would do. i use a sigma 12-24mm on my 1d3. it was $700. i love it. also it covers FF! i tried it on a 5d2 and it is awesome!

[MathewLodge]

Ross,

Amazing stuff!

I also use the Sigma 12-24 and it is just incredible on my 5D MkII... without the mechanical engineering! Wide angle is sorely under exploited on full frame DSLR.

Have fun,

Mathew

[Noel_Carboni]

I LIKE the way you think, Ross. Bravo! Years ago I did that same kind of thing to an 18-55 just to see what it would do.

So terrible things aren't happening in the corners of the images... You haven't tried it on a full frame camera, have you? I'm curious what the limits look like.

-Noel

[Noel_Carboni]

By the way, how are you getting location info into the album for the little maps? Is it keyed off of GPS data in the image file? I don't recall hearing that the 1D Mark III had GPS tagging capability, but it wouldn't surprise me. In any case, it's VERY cool!

-Noel