Petroglyph wrote:Donny out of Element here wrote:besides, of course, trying to shoot black cat in a coal mine in complete darkness. I looked at many pics from A7RII and I think ISO12800 is perfectly fine to use as an upper limit (for comparison my limit was ISO6400 for A7). Any real scenarios in life where you would wished you had f2 or f1.4 for example (in terms of low light, not DOF)?DOF is the reason.Yeah, fast lenses tend to be sought for 2 reasons:1. low light shooting (largely what is being discussed in this topic)2. shallow depth of field (only briefly mentioned here)I really enjoy opening up a fast prime to create extra effects in the out of focus areas of the images I capture. I am perfectly happy with the FE 55/1.8 (as opposed to my Canon FDn 50/1.4). Though, my Voigtlander Nokton 35/1.2 II allows for an extra bit of magic as well.

From DXO graphs:14 stops at ISO 64 to 9 stops at ISO 12,800I try to use the lowest ISO possiblehttp://www.dxomark.com/Cameras/Sony/A7R-II---Measurementsmaljo