>In literally thousands of long lens car pics that have to be critically sharp, >I've found that on or off, shake reduction makes no difference. And I can >easily achieve critical sharpness with a 250mm lens at 1/60th shutter >speed -- on the tripod.
Paul, I appreciate your replying to my request for input. However, I might suggest that your cars are slightly less challenging than a magnitude -5 dot traveling in low earth orbit at 17,200 mph (from a tripod or not) with regard to sharpness and SR effect. I'll have some results to show sometime tomorrow, but I don't think I'm terribly happy with the SR-on shots. Will try again next time without. For the record, I was pretty happy with a star image I shot before the ISS appeared, and I taped the lens so it could not move focus from that spot. I was slightly surprised to find it was exactly at the spot designated for infinity by the Tamron SP. -- 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.
