Don, That's interesting: I discovered this problem with my Sigma 500/7.2 APO MF. This lens is always out of focus. I see this problem also with my Novoflex 600 after checking "missed" shots.
Toine On 4/22/06, Don Williams <[EMAIL PROTECTED]> wrote: > Now this is very interesting. I've been taking pictures of very small > birds recently and many of them > seem to be slightly out of focus. Once in a while there's a good one. In > my case too the in-focus plane > is always a bit behind the subject. The pictures have all been taken > wide open (f4.0) at 1/1000s. > I'll have to set up a test chart and see what's going on. Auto focus is > impossible since the birds > move around a lot and there is a very busy background. The lens (Sigma > 70-300 Apo Macro) hunts like > crazy when I try auto focus. The same problem seems to occur with the > Sigma 400/5.6 APO MF lens. > > Don > > Toine wrote: > > Thanks for your comments. Since I'm not alone with this problem I > > think I need to call Pentax service :( > > This is the second "common" istD problem I encountered, a dead flash > > circuit board was the first one: Are there any more common problems I > > could check or get serviced? > > > > Toine > > > > On 4/19/06, Toine <[EMAIL PROTECTED]> wrote: > > > >> I have noticed that many of my istD shots in manual focus are slightly > >> out of focus. The area in focus is "always" in the background of the > >> spot I focused on. > >> Now I'm wondering if I need to blame my eyes, the +/- slider of the > >> eyepiece, the mounting of the focusing screen, maybe the ccd > >> alignment??? > >> > >> Toine > >> > >> > > > > > > > > > > > -- > Dr E D F Williams > www.kolumbus.fi/mimosa/ > personal.inet.fi/cool/don.williams/ > 41660 TOIVAKKA – Finland - +358400706616 > >
