Seems to me that if you set the camera for the shortest focal length of a zoom range that it would be correct at that length and if you used longer zoom focal length setting it would undercompensate which is still better and definitely no worse than NO SR at all.
On the other hand, there may be a good argument for using the median focal length setting on the camera. In that case, there would be no error when the zoom is set to the median length, but a small error when set fully short (overcompensation) or fully long (undercompensation). In either case, I believe the total error would still be less than NO SR at all at these extremes and of course, much better than NO SR at the median zoom setting. -- J.C. O'Connell (mailto:[email protected]) Home Page - www.jchriso.com Join the Audio CD PLAYER DISCUSSION list - http://tech.groups.yahoo.com/group/cdplayers/ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of P. J. Alling Sent: Monday, July 27, 2009 11:30 PM To: Pentax-Discuss Mail List Subject: Best compromise for focal length using K and A zooms. Yes that's the question. I've been doing an internet search to try to come to a determination. I have a number of K and A class zoom lenses and the K20 manual gives the recommendation that /will/ give the best possible results, which is to set the focal length adjustment in the camera to the actual focal length set on the lens. This is all well and good, and in any circumstance where this is applicable I shall endeavor to use this method. However under 90% of all shooting conditions when I would choose a Zoom lens over a fixed FL lens stopping to check the current chosen FL and dialing it in to the camera for SR is unlikely to happen. So I'm left with several choices. 1.) Set the longest FL. So it over compensates at anything shorter. 2.) Set the shortest FL. So it under compensates, (see above). 3.) Set an intermediate FL. For most this is a poor choice as they seem to use zooms at the extremes. 4.) Turn SR off and use all the old techniques for camera steadiness I learned using 35mm. Any thoughts? Samples? I mean is it better to over compensate for camera shake or over compensate? I can't for the life of me figure out how I would do repeatable tests. So I'm looking for the collective wisdom of the list. Sadly all my fast zooms are old, and all my "new" zooms are slow. -- The free man owns himself. He can damage himself with either eating or drinking; he can ruin himself with gambling. If he does he is certainly a damn fool, and he might possibly be a damned soul; but if he may not, he is not a free man any more than a dog. --G. K. Chesterton -- 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.
