On Feb 23, 2011, at 8:45 PM, Matthew Hunt wrote: > On Wed, Feb 23, 2011 at 8:14 PM, Paul Stenquist <[email protected]> > wrote: >> >> On Feb 23, 2011, at 7:25 PM, Darren Addy wrote: >> >>> the 1/focal length rule really only applies to film/4x6 prints. >> >> The focal length is the focal length, regardless of format. And the shutter >> speed is the >> shutter speed is the shutter speed. Film vs. digital is definitely not a >> factor here. > > Focal length is focal length, but for purposes of the rule of thumb, > it's being used as a proxy for angular field of view. If 1/focal > length is a good rule of thumb for 35mm, then it's the wrong rule of > thumb for any other format.
That's true, but I consider the 1.5 crop factor in applying it. In other words, I expect my 250mm lens to behave like a 374 millimeter lens in terms of shake. 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.
