Speed Booster: full frame fov on an APS-C size sensor

[pharp]

I'd be interested to see if this works with 3rd party cropped body lenses on a M4/3. The Sigma 8-16 (uses the EF mount, even though designed for APS-C bodies) is quite sharp and might be alot of fun. I'm assuming they'd vignette on the NEX.

 

[NormanBates]

ok, so in theory you could make one that allows you to use EF lenses on your EF-S camera without losing FoV

but definitely not with this design: this adapter is actually shorter than a dumb glass-less one

I would think* there must be pretty big downsides to having an actually longer adapter (which is what you need for that EF to EF-S thing) while mantaining infinite focus, plus there's a mirror so you can't end up close to the sensor... I'd pretty much rule it out


* that guess is based on the fact that they had no restritions regarding size, and they ended up with a shorter-than-usual adapter: this must be what gives you the best IQ