On Sun, Jun 12, 2011 at 03:46:38PM -0400, Walter Hamler wrote: > http://walthamler.smugmug.com/Photography/Micro-Four-Thirds-Gallery/16211247_u3uwa#1333816493_QWjXf7X > > The last two images were taken in our local camera store. One is > captioned that it was shot with the EPL2 and the standard lens set at > 14mm (28 equiv). > The next image is with the OLY WA lens adapter, but they do not say > what the effective fl is. Anyone care to venture a guess? > It doesn't quite look like it is 24mm equivalent, perhaps 25. > Both images taken from same distance. > > Walt
Well, the angle of view of the original image covers about 80% of the wider-angle image. That would mean it's 0.8x28mm = 22.4mm equivalent. Given the precision of the actual experiment (you might have moved your feet, or leaned forwards a little more for one shot), all you can tell from those images is that the effective focal length will be somewhere in the 21mm - 25mm range, Postscript: Olympus claim the converter is a 0.8x, which matches my estimate of about a 400-pixel margin on either side of your 4K image. So the effective focal length at full wide will indeed be 22.5mm. -- 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.
