On Thu, Aug 27, 2009 at 07:50:27PM +0200, Ralf R. Radermacher scripsit: > Graydon <o...@uniserve.com> wrote: > > I've never needed to turn the shake reduction off in the K20D. If I > > have the camera on a tripod on a really solid substrate -- bedrock, > > concrete footings -- I don't get any benefit from it, but I haven't seen > > any harm from it, either. > > I've just recenty noticed a rather strange phenomenon with my K-7: > > I usually travel with two tripods. A heavy wooden Berlebach and a simple > metal tripod that has the great advantage of being set-up literally > within seconds as you only need to push three locking tabs to make each > of the legs unfold by spring force. Surprisingly solid and steady, that > little thing.
Sounds very handy! > Put the K-7 with activated SR and Live View on the small tripod and > within seconds the whole combination of camera and tripod will begin to > strongly oscillate at around 10 Hertz. Obviously some resonance > phenomenon triggered by the SR. Never seen anything like that before. The reason I emphasized the "really solid substrate" part is that trying to shoot from a wooden observation platform often outright fails; when there's a bunch of other people trooping across the platform behind me, the wooden surface bounces, and the relatively long-period oscillation defeats the shake reduction. Nothing for it but to wait until they've all passed by and try again. -- Graydon -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
