Archived posting to the Leica Users Group, 1999/05/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jeff, Each manufacturer has a patented process that captures and funnels light. THe guy at Brightscreen incidentally was once employed at Beattie, his process is similar but perhaps slightly improved. I really did not get into the scientific reason as to why one if better than the other, but can only tell you the result. Perhaps some others on the list know more of this and the intricate process used. I know Maxwell was in discussion with Leica, and did send his screens to Germany for review. But to date, he has received no response. Right now Alpa and some other manufacturers are working with him and their new screens may very wellbe Hi-Lux screens. Peter K > ---------- > From: 4Season[SMTP:4Season@boulder.net] > Reply To: leica-users@mejac.palo-alto.ca.us > Sent: Wednesday, May 19, 1999 8:45 PM > To: leica-users@mejac.palo-alto.ca.us > Subject: Re: [Leica] Re: Beattie Intenscreen for Leica R4-7 > > I've had terrific results with the Beattle screens for Rolleiflex SL66 and > Hasselblad--absolutely delighted with everything except the fact that not > even B+H seems to stock them for immediate delivery. I didn't buy an > Accu-Matte because my favorite full-grid pattern with no split-image or > microprism wasn't available. Even with the SL66 bellows racked out almost > fully, with the lens closed down to f/16 *and*a polarizer in use, I could > generally still make out details pretty good using the Beattie > screen--enough to gauge the effects of lens tilt. I haven't tried the > other > brands, but seem to recall paying around $125 for a Beattie, which I > presume > is far cheaper than the others. Compared to the circa-1987 stock > Hasselblad > screen, the Beattie screen is about 4 stops brighter. Of course, the stock > Rollei and Hasselblad screens were bad by today's standards, whereas I > find > the Leica R screens pretty good as-is. > > What makes one viewscreen brighter than another, anyhow? I'm under the > impression that they present the viewer with a narrower but more > concentrated cone of light, but it hasn't been a problem at all on the 6x6 > SLRs. > > Jeff > > -----Original Message----- > From: Kotsinadelis, Peter (Peter) <peterk@lucent.com> > >The absolute best focusing screen is also made by the same person who > makes > >the loupes. Maxwell Precision Optics. >