The biggest drawback for me when looking at alternative systems is the lack of fast lenses. Canon and Nikon have their share of fast primes, but the micro four thirds systems didn’t have a fast prime until now. Panasonic recently released the 20mm f/1.7. Not only is it a fast prime, it’s also a pancake lens that only adds about 1 inch to the the body. It currently fits Panasonic’s GH1, G1, GF1 and Olympus’ EP1 and most-likely Olympus’ upcoming EP2.
Nice color, contrast and sharpness is easily found with some minor adjustments in Lightroom.
Low-light work and shallow depth of field is where this lens shines.
