GH3 GH3 Speed Booster for Pany Lenes

Not sure if that's possible, as the two requirements are that the lenses need to have been designed for larger formats (they need a larger image circle to start with) and a longer flange distance. So Panasonic lenses do not make good candidates. My Pentax full frame primes, on the other hand...
 
Basically, a Speedbooster takes the place of where a mirror would be on a DSLR. It's not possible to create a Speedbooster for a lens designed for any mirror less system as the space for the mirror is not factored in to the lenses image projection. Secondly, the lens has to have an image circle larger than the sensor to allow for the focal reduction.
 
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