So I've done a little reading on the Speed Booster from Metabones. Good breakdown here by Roger Cicala at LR:http://www.lensrentals.com/blog/2013/01/metabones-magic
So, the fastest way to describe it is as the reverse of teleconverter. You lose
length but gain
I know that every time you bolt on something in series to a lens, something bad usually happens from an IQ perspective. But blowing that off for just a moment, I had a question.
This thing is being positioned as a way to shoot a lens on an APS-C body at about the same focal length as FF (i.e a 50mm shot on an APS-C body + this doodad results in a roughly 50mm FF field of view). It yanks out the crop multiplier, if you will.
However, I am far more interested in focusing the light and simulating a faster lens. Would it be possible to make this work on FF bodies? Could I turn my 50 F/1.4 into something like a 35mm F/1.0 on my 5D3?
(Obviously, this version
of speed booster would not work, but in principle, could one make an FF to FF speedbooster?)
Just curious, thx.