EF-S on 1d mk3 1.3crop?

the heading asks the question, can you use EF-S lenses on the 1D?

No, You can only use EF lens.

You can use some (10-22mm) with a touch of modifications. Third party lenses usually work too because they actually have an EF mount.

Whippeticious wrote in post #8401745
the heading asks the question, can you use EF-S lenses on the 1D?

Believe me - if you have to ask this question, you do NOT want to try any of the mods that would allow you to adapt EF-S lenses to a 1D (or any other camera not specifically designed to use EF-S lenses).

Even if you successfully mod it to fit, heavy vignetting will show up at wide end. The only body to mount to that's worth modding is 10D as it's 1.6x but it doesn't take EF-S.

The 10-22mm in particular is pathetically easy to modify. All you have to do is pull off the black plastic baffle from the rear and make sure you don't zoom wider than 12mm or else the rear element will be hit by the mirror. You don't even need any tools and there is virtually no vignetting.

why would you want to do this? if you have a pro camera, put some decent glass on it.

bluefox9er wrote in post #8402248
why would you want to do this? if you have a pro camera, put some decent glass on it.

Cheap macro.

I modded my (unused) 18-55 so I could mount it on my 1DIII.

I set the aperture, hit DOF preview, unmount the lens while its stopped down and remount it reversed.

18mm reversed on the 1DIII is an awful lot of magnification, and no vignetting.



(Before doing the mod I had to use my 20D to stop down the lens)

Vascilli wrote in post #8401939
The 10-22mm in particular is pathetically easy to modify. All you have to do is pull off the black plastic baffle from the rear and make sure you don't zoom wider than 12mm or else the rear element will be hit by the mirror. You don't even need any tools and there is virtually no vignetting.

"Danger, Danger, Will Robinson!"

I haven't got one, I was just asking FFS.

Whippeticious wrote in post #8406354
I haven't got one, I was just asking FFS.

Once a question like this is posted, nothing stops members chipping in with ideas. It's the nature of the beast that is a worldwide forum!

No danger, no fancy mod needed to use the ef-s 10-22 on a MK III. I did it with great results. Put your finger inside of the rear plastic baffle on the lens and pull it off - it just snaps into place - can be easily replaced. Now your 10-22 will mount on your MKIII. If and only if you do not see dark edges in the viewfinder (about 15-22mm) you can safely use it.

You can replace the plastic buffle with the one of the EF 24-85mm so that the lens is still protected. Someone in this forum did it!

Wilt wrote in post #8402930
"Danger, Danger, Will Robinson!"

It did happen to me, the mirror obviously didn't lift all the way and by the time I found out what went wrong and fixed it, the picture was a mess of blown out and totally black areas. No serious damage will happen but I'd still avoid it.

waits for the " omg i have totally f****d up my 1dmkIII by mounting an ef-s lens on it " posts to come rolling in...


seriosuly...wouldn't it be easier all round if you mounted an ef-s lens on a camera that accepts an ef-s mount??