Alex, You have the right forum to ask these questions. I have no problems with the FA*80-200/2.8 on the K10D. Apertures set just fine, exposures are OK.
Your aperture blades are slow. They always start fully open so you can have bright focusing (and you meter at open aperture). When you take a shot, they are not closing down fast enough. They are spring loaded and fly to f5.6 or f8.0 or whatever when you fire. You exposures start while the blades are still moving to fully closed position. Get a simple clean/lube/adjust of the lens. As a temporary measure, try exercising the aperture lever. That is, put the lens at f22 and manually close the lever 100 times. This may help things free up some. I've seen this before with the M28mm f2.8 and other lenses. Regards, Bob S. On 6/5/07, Axel Belinfante <[EMAIL PROTECTED]> wrote: > I just subscribed to the list, essentially to ask the question below. > > I recently got myself a K10d. When I use the kit 18-55 mm > and a FA*28-70 f/2.8 everything seems to work fine. > > However, with my FA*80-200 f/2.8 (aperture ring set to A) > I seem to get consistent overexposure (2 stops or so?), > _except_ when using it fully open (at 2.8) using the > hyper-program shifting or by using Av mode at 2.8. > > It almost makes me feel there is something wrong with > the way the camera tries to set aperture on the lens > (which would explain why it works fine at 2.8: > then it doesn't have to do anything so it works). > Would that be a valid explanation? > > Setting aperture using the ring on the lens, and > then using lcd-preview gives me correct (not overexposed) > preview shots. > > I have not been using the lens so much recently; in the > somewhat longer past I've been using it on a Z1 shooting > slides (last serious usage about a year ago, at the coast) > and I don't recall this kind of consistent overexposure. > I should probably just do some test shots with the Z1 > but haven't found the time. > > Sending the stuff in to pentax service, or even better, > visiting them, would have been another option except > that the dutch pentax service told me they send these > kind of things to pentax europe in Hamburg > (which doesn't really matter, except that if the dutch > pentax service in Breda would still have existed I would > just have visited them there and explained the issue) > and except for the wrong-time-of-the-year problem > (I've been told that due to holiday season it might > take weeks until I would get it back :-( > > > > Don't know if this is the right forum for these kind of questions; > I have seen there are multiple pentax forums out there, but don't > know how they differ. Any thoughts? > > Minor suggestion: inclusion of (pointer to) PDML mini-faq > on the mailing list web page (and/or in list welcome message) > could be useful, if only to be able to appreciate the acronyms. > > > Thanks, > Axel. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
