Originally posted by rparmar Is 28mm the "perfect normal" for the cropped sensor? Should everyone be raving about this focal length? Is so, why did Pentax skip it in the last couple generations of lenses? Or is this one of the reasons the 31mm limited is so appealing?
yes, this is why the 31 is so appealing.
and the raving in the other thread about the 43 was about its optics more so than its field of view.
and the reason the 31 is so appealing over any of the current 28's is because its f1.8 and has super crazy sharp and rendering optics..
all the 28's are F2.8 , its hard to make wide fast glass, which is why the 43 is relativly cheap at F1.9 compared to the other lenses
and why alot of the film users are crying, because 50mm was so popular due to its "natural" field of view, alot of time was devoted into it and hence you get so many "fast" 50mm's, ****, Canon has a F0.95 50mm!! :O
then BAM comes the cropped sensors, the 50mm is now a 75+mm and not as usable as before, and the only alternatives dont come in fast apertures.
altho Sigma is fixing that (20mm F1.8!!!!!) the only thing is (and i have zero way to confirm this) the wide angle fast optics of sigma apperantly are noticebly soft in the corners, but we will soon find out once these thigns hit the market.