Since getting a 1D3 there's one thing I've really been missing... and that is ULTRA WIDE angle. That is one of my most favourite ways to shoot. Canon doesn't make one for 1.3. There's the 16-35... but that's not really ULTRA wide on 1.3.
The 10-22 is one of my most favourite lenses. So, being a total nerd that loves to disassemble things, I thought I'd give it a shot and get it mounted onto the 1D3. Warranty is long passed. Why not?
I decided I'd also rip apart my beloved 75-300 III USM. I didn't want to go for the baffle-less look and the rear element looked close in size to the 10-22 so again, I said, "why not?" Let's potentially wreck two of my favourite lenses!!
So this is ripping out the 75-300 baffle. I managed to destroy one of the tabs that hold it in, but there are 4 so I don' think it matters much. I made a mental note to be more careful on the 10-22:
Now (cafefully) taking out the 10-22 baffle:
So at first, I thought it would be a slam dunk. But it wasn't. The 75-300 baffle isn't perfect. It interferes with the electonics so it won't snap in place. I found the interference to be right under the "IN MALA" letters, which is stamped on the top. (The full text is "MADE IN MALAYSIA")
I thought it was close, just needed about 0.7mm more clearance, so I took a file to the baffle and now it looks like this:
And voila! The baffle now snaps in with no interference! And you cannot tell any filing has been done from the other side! Here is it on the 10-22. I put the EF-S baffle on the 75-300 temporarily while I get another one from Canon. (BTW, the 75-300 doesn't work well with it. You can only zoom from 90-300)
Overhead view with 75-300 baffle on:
This is at 10mm
This is at 22mm, so you can see it's not a perfect baffle to use but it will surely protect it a heck of a lot more than no baffle.
And here you can see it's now flush with the EF mount. The problem now is the rear element sticks out past the mount. This is at 10mm. I have found it does not protrude when you get to 12mm.