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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 08 Dec 2014 (Monday) 14:58
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Full Frame vs. Cropped Lens Interchangeability

 
skifastbadly
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Dec 08, 2014 14:58 |  #1

I recently purchased a 6D which I love. I bought a full frame because as a recent convert from film, I have a fair collection of EOS lenses (including a couple of L lenses) which I wanted to use without having to convert for cropped focal length.

My wife decided that she loved using the digital camera and I am considering a camera for her for Christmas. (Shhh, don't tell her). I'm looking at a kit which includes the 18-55 IS lens. Is there anything about this lens, or any of the lenses designed for cropped cameras, that would prevent me from using it on my 6D as a wide angle lens?

My apologies if this has been hashed over but the more I read the more confused I'm getting.

Thanks


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texkam
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Dec 08, 2014 15:01 |  #2

EF = Fit either

EF-S = Fit only crop




  
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TeamSpeed
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Post edited over 6 years ago by TeamSpeed. (2 edits in all)
     
Dec 08, 2014 15:02 |  #3

1) If the lens is a Canon EFS lens, then it only fits APS-C bodies, except for the 10D, which precedes the EFS lens design, I believe. The Canon EFS lens is the only lens utilizing the alternative mount that matches up to the white dot on the APS-C bodies.

2) If the lens is a 3rd party lens marked for crop bodies, then it will undoubtedly vignette but mount on the FF. Some lenses work well if you add a 1.4x to the lens.

3) Some Canon EFS lenses can be hacked to mount to a FF, but you have to watch the mirror to see it hits the back of the lens. Some 3rd party lenses may have the same effect, with the mirror making contact where it shouldn't.

4) An APS-C body is the most versatile regarding lens use, due to its ability to use EF, EFS and 3rd party crop lenses.


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MalVeauX
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Post edited over 6 years ago by MalVeauX.
     
Dec 08, 2014 15:12 |  #4

skifastbadly wrote in post #17320969 (external link)
I recently purchased a 6D which I love. I bought a full frame because as a recent convert from film, I have a fair collection of EOS lenses (including a couple of L lenses) which I wanted to use without having to convert for cropped focal length.

My wife decided that she loved using the digital camera and I am considering a camera for her for Christmas. (Shhh, don't tell her). I'm looking at a kit which includes the 18-55 IS lens. Is there anything about this lens, or any of the lenses designed for cropped cameras, that would prevent me from using it on my 6D as a wide angle lens?

My apologies if this has been hashed over but the more I read the more confused I'm getting.

Thanks

Heya,

EF-S is a Canon proprietary mount for APS-C only. So if you buy a Canon EF-S lens, it will not fit/work on your full frame. Some can be modified to fit, but there will likely be vignetting and other things to watch out for as the lenses are designed for a smaller sensor in mind. Third party APS-C designed lenses are actually EF mount and will directly fit your full frame, no problem, but again, are made for smaller sensors and you will likely see some vignetting, especially at wider angles.

So if you want to get her an APS-C, and get a relatively wider lens for it that will be wide on your full frame, the option is to look at a Sigma or Tamron 17-50 instead of the Canon 18-55, etc. But you may want to research into what kind of vignetting occurs at the wider end of that lens, on a full frame.

Example:

IMAGE: http://www.bobatkins.com/photography/reviews/tamron_17-50_vc/tamron_17-50_eos5d(2).jpg

Very best,

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jimewall
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Dec 08, 2014 20:15 |  #5

Some third party lenses do ok (AF, decently sharp, and minimal vignetting) on FF with an off brand 1.4X TC. My Sigma 10-20mm f/4-5.6 with a 1.4X does well. Why Sigma 8-16mm does less well on the FF with the 1.4X, but it is better on a crop and no TC than the 10-20 (which is excellent) on a crop. So performance seems to vary with various combinations. The lens and 1.4X TC ends up on a FF being 14-24mm (but f/5.6-8), which is wider than the lenses equivalent view on a crop camera without the TC (16-32mm).

That said, getting a FF UWA lens (17-40, 16-35, etc...) for your wide shots would be better.

(My opinion) Get her a "normal range" zoom for her camera, and share the long lenses you have. Then get yourself a FF ultra wide lens.


Thanks for Reading & Good Luck - Jim
GEAR

  
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Full Frame vs. Cropped Lens Interchangeability
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