Quote from: AnthonyEngelken on December 22, 2013, 12:51:07 AM
Hmm... I think we're having two different discussions. I don't really care about AF; never use it with video. I'm just wondering about the complications in mounting manual lenses closer to the sensor.
I get what you're talking about. You'd need a focal reducer like the Metabones Speedbooster or even the crappy Mitakon (that would probably be sharp enough in the center with the crop mode). Just moving the lens closer or farther away wouldn't give you what you want because the focal plane moves. You need something that reduces the cone of light but keeps the focal plane aligned properly. There was a metabones speedbooster being tested for EOS-M at one point. I don't know what became of it. You can see it on YouTube. That would reduce some of the crop from crop mode. by 1.7. Fotodiox is toying with a 2.0 focal reducer (probably not for the EOS-M). That wouldn't cover the sensor for stills but would work great for crop mode.