Bob Ross Posted November 5, 2006 Share #41 Posted November 5, 2006 Advertisement (gone after registration) Sean, I still don't understand why the 28mm lines show up in a .72x finder but the 21mm lines (same EFOV) don't show up in .68x. It just doesn't make sense to me. But then plenty of other things in life don't either. Part of the discrepancey is that the crop factor for the lenses is 1.33 (or 0.75 going downward) and the difference between 0.68 and 0.72 (the viewfinder mags) is 1.06 (or 0.94 going downward). Or to put it another way the viewfinder crop factor is much smaller that the lens crop factor. If we made the viewfinder crop the same as the lens (0.72 X 0.75) we'd get a 0.54X viewfinder mag. Another thing that the 1.33X crop factor does is to increase the differences in field (FOV)between lenses, or the 15mm difference between a 35mm and a 50mm is now 20mm between a 47mm FOV and a 67mm FOV. Changing lenses will now make a bigger difference in FOV size. On the other hand we wont see it in the viewfinder as much, because of the 1.06X view finder change. Bob Link to post Share on other sites More sharing options...
Advertisement Posted November 5, 2006 Posted November 5, 2006 Hi Bob Ross, Take a look here M8 Viewfinder Limitation. I'm sure you'll find what you were looking for!
eronald Posted November 5, 2006 Share #42 Posted November 5, 2006 Can someone ell me why I can't figure out the field of my 75 Summilux on the M8 ? It's somewhere between whatver the viewfinder displays. Edmund Link to post Share on other sites More sharing options...
ho_co Posted November 5, 2006 Share #43 Posted November 5, 2006 Can someone ell me why I can't figure out the field of my 75 Summilux on the M8 ? It's somewhere between whatver the viewfinder displays. Edmund-- The M8 uses new design standard for finder frames. On previous M bodies, frames showed the field of view of a lens focused at two meters distance. At lesser distance, you got less on film than showed in finder; at greater distance, you got more. According to Leica Allendale, on the M8, all frames are designed to be accurate at closest focus distance of 0.7 m. At greater distances you get more than the framelines show. Advantage is that you never get less than the frame shows. One possible caveat: 75 Summilux focuses to 0.75 m, so if the above is literally true, then even at closest focus you're getting more to the sensor than shown in the framelines. (75 Summicron focuses to 0.7 m.) I hope that helps. --HC Link to post Share on other sites More sharing options...
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