Archived posting to the Leica Users Group, 1997/10/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Regarding light falloff due to cos fourth law Henning J Wulff wrote: >The only real fix is a graduated ND center filter, which large format >users (and Hologon users) are quite familiar with. Does anyone know of a source of graduated ND center filters suitable for use with the 21mm/3.4 SA. Either Series VII to fit in the lens hood or 68mm screw in. I'm aware of the 95mm ones manufactured by Schneider for use with their XL series of large format lenses but I haven't seen any smaller. I'm also told by large format users that the filter should be made to match by the lens manufacturer. Due to its close focussing (40cm) and large angle of view I find the 21mm/3.4 SA to be excellent for photographing plants whilst showing their habitat. Unfortunately many of my pictures include large expanses of what should be a uniform deep blue sky. On chromes the darkening in the corners is most noticeable. I'm not too concerned about exact compensation, anything would be better than nothing. Bob Parsons.