It really is that good!'
'Does the optical performance of the lens decrease when used with the ‘Speed Booster’? It’s easy to assume it would, as you are all aware that teleconverters adapters basically will magnify the aberrations of the given lens.
The reverse is true for the MetaBones ‘Speed Booster’ as it compresses the image and reduces lens aberration for the given lens. Of course, the adapter is not completely aberration free, but still taking this into account, there is a significant improvement in MTF compared to the given lens used without the ‘Speed Booster’.'
So its not just me then.
For discussion - join me over at Google+