優點:
Smaller and Lighter than previous 21mm Leica lenses, sharp images (even for IR use),
quicker focus than other 21mm lenses cos of the curving block for finger focusing,
46mm filters are common in the Leica range of lenses, which makes filter purchasing easier and cheaper (ND, IR filters can be shared amounts few lenses)
評價:
a lens well worth the money,
no worries of color shifts at corners that are common on other brands of 21mm