Falk Lumo has posted an article about it on his blog too: http://falklumo.blogspot.com/2010/04/pentax-shake-reduction-revisited.html
It's a bit tough on the braincells, but quite interesting. For the math challenged like myself, here's the conclusion: "Pentax delivers a capable shake reduction system able to provide up to 4 stops stabilization. However, it is designed to work best at exposure time around 1/20s and therefore, is most useful for normal and wide angle lenses used at low light or in video. Starting at around 100mm focal length, it is increasingly unlikely to see a positive effect from the SR system and beyond 200mm, the SR system cannot be used anymore to produce tac-shap images at lower than usual exposure times." Sadly, this matches my own experience pretty well. :-( Jostein 2010/5/5 Rob Studdert <distudio.p...@gmail.com>: > On 05/05/2010, William Robb <war...@gmail.com> wrote: >> This is eerie. >> http://is.gd/bUqH3 >> And safe to read. >> It's off Thom Hogan's Nikon thingie (note spelling please Tanja), but it >> seems applicable to Pentax as well. > > The response of the movement sensors used in the Pentax bodies is no > where near as fast as 1kHz (though I suspect he's interpreting this > data incorrectly), basically they can detect sway and a certain degree > of jolt. Like Thom suggests there is a definite shutter speed limit to > which SR is useful, pointed out fairly eloquently by Falk Lumo on the > Pentax web forums. It's useful but it's no panacea and really I don't > think I'd miss it at all moving to a camera like the D700. > > -- > Rob Studdert (Digital Image Studio) > Tel: +61-418-166-870 UTC +10 Hours > Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio > > -- > 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. > -- http://www.alunfoto.no/galleri/ http://alunfoto.blogspot.com -- 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.
