Bob wrote: > I've always thought of this as a classic example of pointless > automation. On the older series of prime lenses the optimal aperture > was marked in a different colour from the others. In conjunction with > the depth-of-field scale on the lens this did everything that the MTF > programme does, and all it requires is paint and a fine brush. A nice > simple > solution.
Shel replied > I agree with Bob .... a waste of electrons! Shel, Bob...the depth of field scale does not indicate the lens' sharpest aperture; it merely tells you hyperfocal info. The MTF program does NOT use hyperfocus, it uses the lens' sharpest apertures whenever possible. For instance, if a given lens was okay at f2, good at f4, amazing at 5.6, good at f8, and okay at f11, the camera would try to use f5.6 if the lighting conditions allowed, and otherwise move to f4 or f8, and only use f2 and f11 if there were no other choice. I don't see a method of achieving this anywhere on the hyperfocal scales of any of my lenses. -Aaron - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
