Originally posted by dms So using a full frame lens on a pentax dslr (1.5 cropped sensor) start by using the DOF markings for the lens 1 stop more open. e.g., taking at f/11, use the DOF markings for f/8
Other way around. For a given composition (FOV) and aperture, APS-C will have greater DOF than 35mm FF.
Steve
---------- Post added 03-16-14 at 03:58 PM ----------
Originally posted by MJSfoto1956 In the end, it is important to get your head around the idea that as you stop down your lens, the total distance that will be in critical focus will increase. And that the distribution of that critical range of acceptable sharpness will be distributed approximately 1/3 in front of where you focus and approximately 2/3 behind where you focus. And that longer lenses deliver shorter total distances of critical focus compared to wide angle lenses which have much greater. In the end. one must match the image requirements to the lens.
Well, there ya go! The explanation in a nutshell! My experience has been that the notion of hyperfocal is only useful for situations where manual focus is difficult to determine.
Steve