Sigma 30mm ?
/Dave
http://dave9t5.zenfolio.com
I think we can rule out very fast primes if we assume peak performance is at f/5.6 before diffraction starts to step in. That would then suggest a f/2.8 lens (or slightly slower). That would also be consistent with the Canon f/2.8 reviews for example where the chart goes to f/11 on the right, up a stop each set left.
So, what f/2.8 prime lenses haven't been published yet?
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.
