Re: Official: Fujifilm GFX 50S Medium Format Announced!
Hi Guy,
I suspect that what you may be seeeing is related to the design of the lenses themselves and not the sensor size. For a very long time Large Format lenses for 4\" X 5\" were expected and designed to hit their best and sharpest performance between f16 and f32 with some that would hit their best performance at f11 or f22. My suspicion is that many of the newer designed and very costly Rodenstock and Schneider Kreuzach digital lenses are designed for the largest digital sensors presently available and to perform at their optimum close to wide open or about 1 stop down to f5.6 or possibly f8. As a result these lenses would and quite possibly demonstrate diffraction at about f11. A way to test this would be to compare the performance of some of the older LF 4\" X 5\" lenses with some of the newer Rodenstock and Schneider Kreuznach lenses that do not perform their best until f8 and f11 with those that perform their best at f5.6 or f8 on the same camera/sensor. And yes with all of the LF and digital lenses to take advantage of the usage of tilts and swings to increase the DOF and to stay within the optimum performance of all of these lenses.
Rich
Sep 21, 2016 at 06:22 AM
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