Archived posting to the Leica Users Group, 2012/12/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]don't we expect those changes from reciprocity failure during long exposures? That would vary from film to film or sensor to sensor ric On Dec 7, 2012, at 11:58 AM, "Frank Filippone" <red735i at verizon.net> wrote: > Found a reference ... where the guy said that the Heliopan had less color > shift than "others". Will try to find the filter... B+H has them. > > Thanks Bob..... > > Frank Filippone > Red735i at verizon.net > > > I remember a thread in getdpi.com about this. Look under Medium Format > (Dante's Inferno) and filter for a thread about ND filters. I person on > there did a lot of testing. Membership is free and worthwhile. > Bob > > On Thu, Dec 6, 2012 at 10:55 PM, Frank Filippone <red735i at > verizon.net>wrote: > >> I am interested in slowing down things, a lot. I had picked out a 10 >> stop ND filter, then did a bit more research, where I found this >> tidbit...( though it is for a 6 stop reduction) >> >> >> >> "This B+W Neutral Density Filter reduces the light by six f-stops. >> With this filter and without changing the f-stop, a shutter speed of >> 1/60 s is changed to a full second, thus requiring the use of a >> tripod. Flowing water is rendered as flowing in the photo, and people >> moving in streets are dissolved in unsharpness or become invisible. >> Because of its higher transmission in the red beyond 660 nm, this >> filter brings a slightly warm tone to color photographs. If this >> effect is undesirable, a B+W UV-/IR-Blocking Filter >> 486 >> in front of the neutral density filter (not behind it) remedies that >> situation. The filter factor is 64x." >> >> >> >> >> >> Has anyone ever heard of a ND filter of this strength being a bit warm >> toned? >> >> >> >> Frank Filippone >> >> Red735i at verizon.net >> > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information