06-08-2017, 08:48 AM
Quote:NO, IT'S NOT!
Otherwise it would be specified as such one. Please stop this equivalencing shit - on Nikon it's a different equivalence, on Sigma sd quattro H again another one - and since no AA filter is involved, you get different airy disks. Your reply is generalizing and therefore wrong.
DoF is no exact science and depending on sensors, Anti Aliasing filters and print scales. The speed of a lens in terms of aperture is remaining and for some, if not most buyers of fast lenses much more important than this crappy, lousy equivalencing blurb.
This is an APS-C lens with an APS-C image circle - you may argue with 1.55x or 1.6x there but that's about it.