Originally posted by i83N Serosly pepole with FF lenses complaining about no FF sensor must just shoot on film because they stuck in past. Idely every time new sensor is made it should have new lenses specially made for it,
There are a number of considerations in relation to sensor size, but for many of us it boils down to creative control over depth of field (DOF) and availability of decent and relatively compact wide-angle options. There are reasons why 35mm film was and is such a popular film size despite more compact formats being available (e.g. 1/2 frame, 110, 16mm, Minox, etc.). It has to do with "sweet spot" in each of the following areas:
- DOF control
- Size of kit (both bodies and lenses)
- Lens maximum aperture
- Viewfinder image
Yes, "sweet spot". Great DOF control, available compact fast glass, and large bright viewfinder images in a package that is easily hand-holdable and compact.
In case you don't get the DOF connection. Have you ever shot medium format? If you have, you are probably aware of why there are NO f/1.4 lenses for say the Pentax 645d and no, it has nothing to do with physical size. Instead, it has everything to do with DOF. As the format size increases, the available DOF for a particular aperture decreases. A 80mm f/1.4 normal lens for the 645D would have razor-thin DOF and would be unworkable wide open.
The opposite is also true. With APS-C and smaller formats even a fast lens does not provide adequate subject isolation in many cases for normal or wide angle shooting.
Steve
(BTW...am seriously stuck in the past and shoots film (35mm through 4x5) to get the creative control missing in APS-C digital...)