Well, for one thing the object is moving and I can tell you it is hard to even find it to put it into your viewfinder (a single point of light in a field of darkness). You don't know the exact point at which it will reach apogee and when it does it is at it's closest approach (best place to shoot it) which is virtually directly overhead.
Not sure how successfully you have used a tripod to shoot something straight up, but it is not my idea of a good time. Finally, if we are shooting at a high enough shutter speed (which I still haven't determined) then the tripod should be unnecessary, at least as far as sharpness is concerned. The ISS is a metallic object reflecting the sun's rays quite well, so you are in effect shooting a daylight object in a field of blackness. I shot at 1/1250 at ISO 3200 (f8 telescope attached in the form of a Tamron SP 500mm mirror lens). -- 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.
