06-28-2015, 09:24 PM
Quote:35-100mm f1.4 would be enormous, heavy and so expensive only few people on the planet could afford it...
You seem to think that it would have to be heavier than a standard 70-200 f2.8 for a full format DSLR. I think all you need would be an equivalent to the aforementioned lens and something like the metabones speedbooster, only with 2 stops instead of one, integrated into the same lens.
I understand that currently there is no such thing a s two-stops speedbooster because the flange distance of DSLR lenses doesn't leave enough room for that, but if it were designed from scratch as one single lens, why not?