Um, I'm probably not the first one to think of this, but if you have a K or M lens that you just ~must~ use with the *ist D, why not remove the aperture coupling arm??? It would effectively turn it into a manual diaphragm lens. Of course it would be a shame to do this to a really nice lens like the K-15/3.5 or K-18/3.5, but I would have no qualms "crippling" a K-55/1.8 for a fine 82.5mm portrait lens that is known for being a bit soft wide open :-)
Date: Fri, 15 Aug 2003 15:26:47 +0200 From: Arnold Stark <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: Re: istdee Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit The *ist D does not have the aperture simulator coupling ring (you find its coupling lever at 2 o'clock on your LX) that is needed so that the camera knows how far the lens stops down during exposure. Without this ring, and with any lens not in "A" position, open-aperture measurement is not possible. Stop-down metering is possible with srew mount lenses or lenses with fully manual aperture like the K500/f4.5 or the K28/f3.5. Stop-down metering could also be possible with all lenses, if Pentax had programmed the *ist D's meter to work when DOF preview is activated. Unfortunately, Pentax did something else: In aperture priority mode the meter works but the aperture always stays fully open. In manual mode the meter does not work but the lens stops down during exposure. Arnold Steve Larson schrieb: >Looks to me like it has the aperture activator mechanism. I saved that jpeg of the istdee and enlarged it with ACDSee, it`s about 8 0`clock, looks just like the one in my LX. If that is indeed a mechanical actuator I don`t understand >why a K or M lenses will not work. Steve Larson Redondo Beach, California __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com
