My F zoom lenses appear to have a second mark (a green dot) on the aperture (not there on the primes) which would appear to align with the lower of the two f settings. My guess would be this is the real f stop for the opposite and of the range...
e.g. an F 70-210 1:4-1:5.6 Main orange f stop mark is at f4 when the green dot is next to f 5.6. The orange mark is showing the f stop for 70mm and the green dot is showing it for 200mm. So it would follow that when the lens is zoomed in between those two focal lengths that the aperture would be somewhere in-between the two. Unless I am missing something this *must* be the case... I would say in order to get f8 you need use the lens like a prime (at one or other end of it's zoom range), and set the f8 against the corresponding mark for whichever end of the range you are using. Perhaps somebody else has a more definitive answer, as this is certainly only my best guess. Regards, /\/\ick... - 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 .
