EOSHD is launching a Shooter’s Guide for lenses on the Sony A7R – pre-order it here to get $10 off the launch price Currently the best (read expensive) full frame lenses for low light are the Zeiss Otus 55mm F1.4 and the Leica M Noctilux 50mm F0.95. How does the SLR Magic HyperPrime 50mm T0.95 rate as an alternative?