On Feb 23, 2011, at 9:49 PM, Darren Addy wrote: >> 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. >
I just re-read your original post and realized you're planning to shoot this without a tripod. In that case, you definitely want shake reduction, regardless of shutter speed. But why wouldn't you use a tripod? Tough to frame to be sure, but the tripod will be a huge advantage. Paul > -- > 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. -- 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.
