skifastbadly wrote in post #17320969
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.
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.