On 12 Dec 2004 at 18:19, Chris Niesmertelny wrote: > I broke out some non-A lenses to play with on the *ist D today and ran them > thru > some exposure tests. When pressing the green button in moderate to good > light, > it seems to be giving accurate exposures when the lens is stopped to f5 or > larger. When stopped down further than this, it often actually shortens the > time value, significantly underexposing the image. It seems to give only > accurate readings when the time value is .3 seconds or shorter; anything where > the actual exposure should be longer than this will not be exposed correctly > by > the camera, and in fact it will not set a time value slower than 1.5 seconds > when even common sense indicates it should be a 3 or more second exposure. > Has > anyone else suffered this problem? I've done the basic stuff, checked the > lens > for defects (used all my non-A lenses, for example), cleaned the contacts on > the > camera, checked the program function. It's maddening. Any feedback would be > appreciated. I'm dreading sending this off to service. Perhaps I've > forgotten > something in the operation?
Two things to consider, firstly you have to be working within the cameras metering sensitivity, working with stop-down metering vs open aperture limits the range somewhat. Secondly when metering in stop down mode light entering at the finder may cause a significant effect on metering. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
