Wrong doodad. I'm thinking of the thing on the SP500. It's been so long . . .
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Charles Robinson Sent: Friday, September 11, 2009 2:55 PM To: Pentax-Discuss Mail List Subject: Re: Aperture sumulator was (Re: Pentax K-7 review, part 3 - the final.) On Sep 11, 2009, at 13:38, Desjardins, Steve wrote: > It was, essentially, a little doohickey inside the body end of the > lens mount that pressed a tiny pin on the older lenses that would > make the lens stop down to chosen f stop. It went away when Pentax > ate from the tree of digital knowledge, but many still await its > return. > bzzt! It was a lever on the body which would interact with a lever on the lens (K-M series automatic lenses) so that the camera body would know: "hey, this lens is now stopped down to such-and-such a stop" while allowing the aperture to remain all the way open. The light meter would compensate as if there was less light coming in so that you'd know the exposure was set correctly. When the photo is/was taken, the other thingie which has been holding the aperture all the way open would drop and the lens would stop down to the set value - shutter opens, shutter closes, aperture again pops all the way open. This ability (to "just know" what aperture the K or M lens is set to) is not in the digital SLR bodies. If you have a "non-A" lens, and you want to shoot at something other than wide open, you have to use manual mode and "the green button" to physically stop down the lens, take a light reading WITH THE APERTURE STOPPED DOWN, and then pop the aperture wide open to let you focus, compose, etc. I may have some specifics wrong, but that is *basically* it. -Charles -- Charles Robinson - [email protected] Minneapolis, MN http://charles.robinsontwins.org http://www.facebook.com/charles.robinson -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
