On Monday, January 28, 2002, at 11:57 PM, Gary Murphy wrote: > > I understnad that. I guess what I was asking did not come across. > > Why did Pentax choose to make a f/4 constant zoom using the diaphragm > to maintain that, rather than > making a f/2.8 - f/4 zoom on this lens.
Well, because as it moves from 2.8 to 4, there is a change in f stop that is gradual, not sudden, at every aperture, so those of us who use spot meters or hand held meters or who work with flash without TTL find zoom lenses that change their aperture as they zoom to be a bit of a pain. -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 .
