so a little bird tells me today about ....

that EFS lenses will screw your 5d up even if you put it on just once and take a few pics...

but I dont believe thats true, I've take a few snap shots with my 10-22 on my 5d classic before (havent tried it on mk2) and they came out all messed up but it didnt mess up the camera in anyways, I threw on my L after that it worked just fine....


so what is this rumor which I'm sure has been covered already before, but let me reprise the commentary with this Q?

EF-S stands for short back focus. For some lenses, if you zoom in/out too much, you are going to hit the mirror thus damaging your camera.

g3ck0 wrote in post #9199637
EF-S stands for short back focus. For some lenses, if you zoom in/out too much, you are going to hit the mirror thus damaging your camera.

bingoooo

the EF-S lenses have a rubber boot to keep the mirror form hitting the metal in the rear mount.
This is no guarentee you cant damage something though.

I tested a few EF-S lenses onto my camera also and alsothe Sigma 55-150, it worrked fine.
I had no issue at all, but all my images had a black circle around them as expected
on my 5D FF camera with a crop format lens.

crowflyawa wrote in post #9200217
the EF-S lenses have a rubber boot to keep the mirror form hitting the metal in the rear mount.
This is no guarentee you cant damage something though.

I tested a few EF-S lenses onto my camera also and alsothe Sigma 55-150, it worrked fine.
I had no issue at all, but all my images had a black circle around them as expected
on my 5D FF camera with a crop format lens.

yep thats what happened with I took my 17-35 and used it on my ff

Isn't putting an EF-S lens on a 5d, like putting Walmart tires on your BMW anyway?

Aren't BMW tires made by bridgestone? I think I've seen bridgestone at walmart...and everywhere else

I tried to mount several EF-S lenses on my 5D and 1D but they wouldn't even mount? Maybe I was 10 degrees off in rotation or something?

My Tokina 11-16 worked just fine on the 1D but I'd be very cautious about putting ANY EF-S lenses on a larger-than-1.6-crop body.

Eiro wrote in post #9199606
that EFS lenses will screw your 5d up even if you put it on just once and take a few pics...

but I dont believe thats true, I've take a few snap shots with my 10-22 on my 5d classic before (havent tried it on mk2) and they came out all messed up but it didnt mess up the camera in anyways, I threw on my L after that it worked just fine....

so what is this rumor which I'm sure has been covered already before, but let me reprise the commentary with this Q?

Can you take a photo of the back end of your 10-22? It sounds like someone modified it.

A stock EF_S lens physically cannot be mounted on a non-EF-S body.

JeffreyG wrote in post #9200807
A stock EF_S lens physically cannot be mounted on a non-EF-S body.

That is incorrect.

I have and other people have also mounted EF-S lenses on 5D and 5D MKII cameras.
Some people have mixed results, and it is a risk and not recommended.
But it can work fine too.

The sigma 50-150 is a good example of one i mounted on my 5D and took shots. want me to post the pics with exif?

The 10-22 has a plastic baffle on the rear that can be popped off without damaging it. It can then be mounted on a FF, except that the lens will vignette badly at < 15mm. Apparently it will interfere with the mirror at 10mm. I haven't tried it at less than 11-12 and although it vignettes badly, it clears the mirror.

Originally Posted by JeffreyG

HTTP response: NOT FOUND | MIME changed to 'text/html'

A stock EF_S lens physically cannot be mounted on a non-EF-S body.

crowflyawa wrote in post #9201076
That is incorrect.

I don't think you should call 3rd party lenses EF-S. So I think that statement IS correct.

Canon EF-S lenses need to be modified in order to mount on a FF camera. On many EF-S lenses this is done by simply sticking a finger into the rear opening and popping out the little plastic piece that prevents the lens from fitting to a FF. On others (18-55) you need to cut off the protrusion as it is physically part of the plastic mount.

Sigma, Tamron, Tokina, etc, use a standard EF mount and will of course mount on any FF camera. I don't believe there are any 3rd party lenses that have the rear element protruding past the rear of the mount, so there is no risk of damage and no need or the EF-S style mount.

Canon EF-S lenses often have the rear element protruding past the rear edge of the mount and will hit the mirror at wide focal lengths.

JeffreyG wrote in post #9200807
A stock EF-S lens physically cannot be mounted on a non-EF-S body.

Quite true

crowflyawa wrote in post #9201076
That is incorrect.

I have and other people have also mounted EF-S lenses on 5D and 5D MKII cameras.
Some people have mixed results, and it is a risk and not recommended.
But it can work fine too.

The sigma 50-150 is a good example of one i mounted on my 5D and took shots. want me to post the pics with exif?

Crow, your statements are incorrect. However, I do believe that you are confusing something.

First off, a Sigma (or any other third-party) "digital only" lens is NOT an EF-S mount lens. They will mount on any Canon EF-mount camera, though there will be a lot of vignetting, etc.

Canon EF-S mount lenses CANNOT be mounted on cameras not designed to accept them without modification of the lens. If one modifies the mount of an EF-S lens and uses it on other bodies, there is very definitely a risk of crashing the camera's mirror into the rear element of the lens when the lens is used at some focal lengths.

crowflyawa wrote in post #9201076
That is incorrect.

No it's not.

3rd party lens manufacturers don't use the EF-S mount, they use a standard EF mount, even if it can only be used on a crop body.

Canon EF-S lenses can only be used on the 7d, the Rebel cameras, and the 20/30/40/50D's.

OP specifically referred to a '10-22' lens, and only Canon make such. The Canon EF-S 10-22 will not physically mount to a 5D unless the rear baffle is tampered with.

3rd party lens companies make small format only lenses (like the Sigma 10-20) and these lenses will physically mount to a 5D but they only provide partial coverage of the sensor.