which of my lenses won't be compatible with full frame?

J

joescrivens

Suspended / Banned
Messages
15,052
Name
Joe
Edit My Images
Yes
Ok So all my canon lenses are EF and not EF-s so I understand these can be used on a full frame canon, but what about my sigma and tamron, can any of the following be used on full frame if I went to one in the next few years:

sigma 30mm 1.4
tamron 17-50 2.8 xr
sigma 10-20 4-5.6
 
none of those will work on full frame as they are all APS-C lenses.
 
ok, but my canon's will be fine right? since they are EF lenses?

is it something to do with the connection to the body on the APS-C lenses?
 
APS-C lens won't cover the full frame on a crop camera which is why they are not suitable. Nothing to do with mount or connections per se.
 
looks like you'll have some lenses in the for sale forum then :)
 
puddleduck said:
APS-C lens won't cover the full frame on a crop camera which is why they are not suitable. Nothing to do with mount or connections per se.
Click to expand...

i think with canon the rear elements can protrude far enough to obstruct the mirror with their dx lenses or something like that?
 
joescrivens said:
so the lenses will fit on the mount they just won't work.
Click to expand...

The rear element of the lens protrudes further inside the camera. Fitted to a full frame camera the rear element will foul the larger mirror.
 
You sure?

On another forum a guy posted a picture taken with a 17-50mm on a FF canon body and he didn't mention any broken mirror issues.

I think that it's only the EF-S lenses that go further into the camera body and even then I've seen mods on line that show you how to mount EF-S on a FF body. As far as I remember all you do is cut the end down.

Why you'd bother is another matter, but people will always try. All you get is a surprisingly small image circle as if you are looking down a tunnel.
 
Well, I've heard of modifying the rear mount which I personally wouldn't entertain. Fair does... I misread the post - EF-S lenses will certainly foul the mirror on a full frame camera, I'm not sure how it would work with other brand lenses
 
There are some 3rd party EF-S lenses that'll fit on a full-frame body, but as said you'll get a small image circle and it's not recommended. I saw some samples of a Tamron 11-18 on full-frame a while back somwhere :thinking:

Chris
 
Guys - These lenses ARE NOT EF-S. Only canon curently makes EF-S mount lenses.

The lenses themselves when used with Canon are EF mount lenses albeit they have smaller imaging circles that suit only crop cameras. That is different and the lenses will fit and work on FF cameras.

The comment above regards vignetting are correct though.

The Sigma 30mm & the 10-22 image circles are just not large enough to fill a FF sensor, and prety bad vignetting will occur. Although the vignetting will be reduced as you stop the lens aperture down you reduce the size of the imaging circle by doing that.

The tamron too will vignette at all focal legnths on a FF camera although again if you stop down a bit it should start to look better.

hope this helps.

Cheers
Jim
 
woof woof said:
I've seen mods on line that show you how to mount EF-S on a FF body. As far as I remember all you do is cut the end down.
Click to expand...

Why would anyone want to do that? :thinking: :cuckoo:

It's a bit like a Nikon user putting a DX lens on a FX body. Sure the Nikon system allows for this, but you only end up being able to use the central part of the sensor. As previous posters have pointed out, if you did somehow manage to hack an EF-S lens to fit an EF body, you'd get massive vignetting around the edges of the frame - same result.

Edit - the whole idea of the EF-S mount is to allow the rear element of the lens to be closer to the sensor on a crop SLR, which makes it possible to build smaller, lighter wide-angle lenses. So you'd need to be a bit careful on choosing an EF-S lens to "cut the end down", otherwise you'd be cutting off a chunk of glass! :cuckoo:

A.
 
"...and prety bad vignetting will occur."

The examples I've seen are not just pretty bad...they're a small image surrounded by blackness.

As to why, I suppose some people just like the challenge! :thinking: :lol:
 
Anorakus said:
Why would anyone want to do that? :thinking: :cuckoo:

It's a bit like a Nikon user putting a DX lens on a FX body. Sure the Nikon system allows for this, but you only end up being able to use the central part of the sensor. As previous posters have pointed out, if you did somehow manage to hack an EF-S lens to fit an EF body, you'd get massive vignetting around the edges of the frame - same result.

Edit - the whole idea of the EF-S mount is to allow the rear element of the lens to be closer to the sensor on a crop SLR, which makes it possible to build smaller, lighter wide-angle lenses. So you'd need to be a bit careful on choosing an EF-S lens to "cut the end down", otherwise you'd be cutting off a chunk of glass! :cuckoo:

A.
Click to expand...

But the OP doesn't have EF-S lenses :) Sure they vignette but they fit.
 
With Canon stuff, the actual "mount" part of EF and EF-S lenses is actually the same, and compatible with all EOS cameras; the difference with EF-S lenses is that part of the lens extends back further beyond the mount, and will interfere with the mirror mechanism on full-frame cameras, which can cause physical damage to the camera.

Also, EF-S lenses have a smaller image circle. So, even if they didn't have the extra bit protruding at the back, and therefore could be used on a full-frame, they would vignette quite heavily.

However, third party lenses, like Sigma, are either designed with a large image circle for FF cameras (their DG range), or a small image circle for crop sensor cameras (Sigma's DC range), but, because the DC range don't have the "protrusion" of the EF-S lenses, they can be used on crop and FF cameras (although, as explained, vignetting will occur when using a smaller image circle on a full-frame camera).
 
ok so my initial assessment was right then:

they'll fit, they just won't work

cheers
 
joescrivens said:
ok so my initial assessment was right then:

they'll fit, they just won't work

cheers
Click to expand...

"And, with that, he was off to the Classifiieds section as fast as his little legs could carry him..."

~The End~

:lol:​
 
joescrivens said:
ok so my initial assessment was right then:

they'll fit, they just won't work

cheers
Click to expand...

They will work if you are prepared to crop heavily :) Or stop down a lot.....
 
So EF lenses can be used on crops and full frames, but EF-S can only be used on crops. Why would anyone limit the bodies that their lenses can be used on if they have the option of creating a lens that can be used on both? Why not always make EF type lenses?
 
Q.
joescrivens said:
So EF lenses can be used on crops and full frames, but EF-S can only be used on crops. Why would anyone limit the bodies that their lenses can be used on if they have the option of creating a lens that can be used on both? Why not always make EF type lenses?
Click to expand...

A.
Anorakus said:
the whole idea of the EF-S mount is to allow the rear element of the lens to be closer to the sensor on a crop SLR, which makes it possible to build smaller, lighter wide-angle lenses.
Click to expand...
 
joescrivens said:
So EF lenses can be used on crops and full frames, but EF-S can only be used on crops. Why would anyone limit the bodies that their lenses can be used on if they have the option of creating a lens that can be used on both? Why not always make EF type lenses?
Click to expand...

ef lenses are bigger and more expensive, whereas EF-S are cheaper to make and smaller so they are good for the average consumer or togs who aren't going to go FF.
 
joescrivens said:
is that just for EF-S lenses? what about APC-S lenses?
Click to expand...

APS-C lenses all have a smaller image circle (less glass) meaning they should be smaller and lighter than the lenses more suited to Full frame.

You don't seem to have any EF-S lenses so dont bother about them. However the lenses you have will not cover the whole of the Full frame sensor so that is why the lenses vignette.
 
Chaz Photos said:
the mirror will hit the lens as the back element will be inside the body
Click to expand...

Chaz
Please read the posts. This has been discussed and you are wrong! These lenses are NOT EF-S lenses. Only CANON EF-S have the back elements inside the body.
 
joescrivens said:
so that explains why they do it for wide angle, but what about all the other lenses that aren't wide angle lenses?
Click to expand...

Same idea. With smaller image circles, you need less glass so the lenses are smaller and lighter.
 
These are the ONLY lenses currently with the rear element that would extend into the camera (ALL CANON)

EF-S 10-22mm f/3.5-4.5 USM
EF-S 15-85mm f/3.5-5.6 IS USM
EF-S 17-55mm f/2.8 IS USM
EF-S 17-85mm f4-5.6 IS USM
EF-S 18-55mm f/3.5-5.6 IS
EF-S 18-135mm f/3.5-5.6 IS
EF-S 18-200mm f/3.5-5.6 IS
EF-S 55-250mm f/4-5.6 IS
EF-S 60mm f/2.8 Macro USM

Don't think I missed any - None of the above will be able to be used on a FF camera (without modification).

All other EF lenses (inc third party) will work although the digital crop lenses of third patries will result in vignetting.
JD
 
EOS_JD said:
APS-C lenses all have a smaller image circle (less glass) meaning they should be smaller and lighter than the lenses more suited to Full frame.

You don't seem to have any EF-S lenses so dont bother about them. However the lenses you have will not cover the whole of the Full frame sensor so that is why the lenses vignette.
Click to expand...

ok, so how come both my 50mm 1.8 and my 85mm 1.8 are both smaller and lighter than my 30mm sigma?

weird
 
joescrivens said:
ok, so how come both my 50mm 1.8 and my 85mm 1.8 are both smaller and lighter than my 30mm sigma?

weird
Click to expand...

I think it may just be the Canon EF-S lenses that are smaller and lighter due to the design of the rear element - so my answer wasn't 100% accurate.

I actually wasn't aware that the 30mm sigma was a dc lens until I saw this thread as I'd thought about buying it - Saving for the 5D II so might miss out on the 30 now.
 
You must log in or register to reply here.
Back
Top