Juan Buhler wrote: > Interesting, it would be fun to play with a bigger-sensor camera with > live preview. I looked online to see what primes are available, and > the 25mm (50mm eq.) from Leica and Sigma seem really big--62mm and > 77mm filter size. What gives? Why not a 48-49mm filter size normal > prime? Is there anything I'm missing, optically?
Because a shorter focal length - especially whan you have to cope with a long register for accomodating the mirror - needs a complex lens construction. Smaller format DSLR gain compactness on the longer focal lengths and lose it on the short end. APS is probably the best balance (a 14-300 outfit is way smaller than a 21-500 or so for 35mm), while a FourThirds outfit needs a 10-250 range. Then, adding the extra speed needed for balancing the worse signal/noise ratio of smaller-size pixels, makes the FourtThirds a much debatable solution. I think it's just too small to work effectively and be ready for the future (as it's boasted to be). APS within a FF-ready system is much better, IMHO. Dario -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
