ack, pls correct me if I am wrong, but I want to settle this argument w/ a friend

[andylawcc]

On the other hand, my friend said EFS lens will not mount on EF body period. My understanding is both EFS and DX (previously I incorrectly used AFS) lenses can mount on full frame bodies, but will not work properly (massive vignetting at wider focal length... anything else?)

 

[randomlinh]

EF-S mount will unlikely work. mirror will smack into the rear element.

however, most crop lenses from 3rd parties are using the standard EF mount, and will vignette as you said.

Nikon I believe allows you to mount, and just crops for you (eg, it has a DX mode). And btw, it's DX/FX I believe for crop/full frame... AF-S is like USM

 

[andylawcc]

so should I edit "AF-S" to DX and "AF" to FX?

btw: I like the "sidewalk" pic alot better than the other one for the inauguration aftermath contest, unfortunately I have to logon to vote. ;p

 

[virtuamike]

For Nikon, it's DX and FX to differentiate between crop vs full frame. AF and AF-S stand for body screw-driven focus vs in-lens focus motor.

You can mount DX lenses on FX bodies, but the image circle won't cover the whole frame at certain focal lengths. Other than that, they'll work. Or if you have your body configured to automatically crop, then it'll crop depending on what lens you're using.

 

[twistedlogic]

Full frame is 35mm. Nikon's DX and Canon's EF-S are APS-C sized sensors.

You can mount Nikon DX lenses on their FX cameras, but as mentioned the image circle will not cover the frame completely (unless you shoot DX mode, which is only 5mp). Even some of the FX designated lenses can cause slight vignetting because of the FX sensor size.

Your friend is correct about Canon. You cannot mount EF-S lenses on EF cameras, but I think you can mount EF lenses on a EF-S camera. Even if you modify an EF-S lens to fit, as mentioned above the mirror will collide with the rear element, possibly causing damage to the mirror and/or lens.

Edit: proof-read

 

[ElFenix]

canon ef-s lenses won't mount unless you change the mount. some of the lenses protrude into the body more than a regular ef lens does. i'm not sure if any of the lenses actually have an element there (the only one that would need it is the wide angle, the prior 18-55 just had a useless rubber donut back there iirc). again, something you'd have to remove to get it to work.

 

[jpeyton]

Sony also lets you mount their crop lenses on their full frame body.

On the A900, you still get a very impressive 11MP image with the camera cropping the frame to APS-C size.

The D700/D3 and their 5MP crop mode is enough for an 8x10 at the most, and web use of course.

 

[Deadtrees]

Your friend is right.

 

[soydios]

your friend is right.

an EF-S lens will not mount to an EF body.
a DX lens will mount and function fully on an FX body. the sensor of the FX body will be limited to the DX image area if you have that option selected, but the lens works just the same as if it were on a DX body.

 

[996GT2]

In short:

You cannot mount an EF-S lens to an EF body unless you do some hardware modifications. If you mod it, then yes, it will mount and it will work, but you might get vignetting and loss of corner sharpness.

An APS-C lens with an EF mount (Sigmas, Tamrons, Tokinas) will mount and work on an FF body without any modifications. However, they may exhibit vignetting at some or all of their zoom ranges, depending on the lens.

Some APS-C lenses do work pretty well on FF or 1.3x, though. I've heard of quite a few people using the Sigma 10-20mm as an ultra-wide on their 1D series bodies.

With Nikon, a DX lens will work on an FX body, and you have the option for automatic in-camera cropping to the DX sensor size.

 

[ElFenix]

i use a sigma 10-20 as an ultrawide on my cheapo film rebel.

very unbalanced that way. film rebel weighs nothing.

 

[996GT2]

Originally posted by: ElFenix
i use a sigma 10-20 as an ultrawide on my cheapo film rebel.

very unbalanced that way. film rebel weighs nothing.

At what point in the zoom range does it stop vignetting?

I've heard it stops at about 13mm on 1.3x sensors, so maybe 16-18mm on film?