The other big issue is that most SR systems only correct for angular movement (pointing the camera in various directions). At macro distances, translational movement (shifting the camera) is also significant. Canon has some recent IS macro lenses that are supposed to compensate for both types of movement.
On Thu, Oct 25, 2012 at 11:25 AM, Jos from Holland <[email protected]> wrote: > exactly, maybe at the end it all boils down to viewing angle. Maybe focal > length should be replaced by "viewing angle at focus", gets us rid of > correction factors for APS-C versus FF as well. > Jos > > On 25-10-2012 11:35, J.C. O'Connell wrote: >> >> I would think the reason SR doesnt work well for macro is that the >> effective focal length of the lens gets significantly longer when >> in macro mode causing a mismatch of SR parameters and lens in use. >> >> ----------------- >> J.C.O'Connell >> [email protected] >> ----------------- >> >> -----Original Message----- >> From: PDML [mailto:[email protected]] On Behalf Of Toine >> Sent: Thursday, October 25, 2012 5:18 AM >> To: Pentax-Discuss Mail List >> Subject: Re: What about immage stabilization and macro >> >> K20D manual page 67 >> K5 manual page 142 >> >> "The effect of shake reduction is influenced by the shooting distance >> as well as focal length information. The share reduction function may >> not work as effectively as expected when shooting at close ranges" >> >> >> >> On 24 October 2012 23:33, Brian Walters <[email protected]> wrote: >>> >>> Quoting Toine <[email protected]>: >>> >>>> If I remember correctly the manual claims SR should be switched off for >>>> macro. >>> >>> >>> >>> I don't recall seeing that in the K200D or K-5 manuals - not saying it >> >> isn't >>> >>> there, but they are large manuals and I have a short attention span :-) >>> >>> The manuals do say to switch SR off if the cameras are tripod mounted. >>> >>> >>> >>> Cheers >>> >>> Brian >>> >>> +++++++++++++++++++++++++++++++++++++++++++++++++++++ >>> Brian Walters >>> Australian Native Plants Society (Australia) >>> http://anpsa.org.au >>> >>> >>> >>>> Toine >>>> >>>> On 24 October 2012 18:32, Jos from Holland <[email protected]> >>>> wrote: >>>>> >>>>> I always wondered how to adjust for image stabilization in macro. I use >>>>> SMC-M 100mm macro and SMC-M 50mm on my K5d quite often with a macro >> >> ring. >>>>> >>>>> I >>>>> have to adjust the focal distance of the lens manually. But what really >>>>> counts for image stabilization is the angle of view, I guess. So should >> >> I >>>>> >>>>> use a correction factor and adjust maybe 300mm for the 100mm lens??? >>>>> Similar >>>>> things for my Sigma 17-70mm in macro mode. Any thoughts?? Greetings, >> >> Jos >>>>> >>>>> -- >>> >>> >>> >>> -- >>> 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. -- 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.
