Archived posting to the Leica Users Group, 1998/03/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Pete, I am truly awestruck! Steve At 02:35 AM 3/14/98 EST, you wrote: >Dear LUGnuts: > >Some of you may recall my efforts in trying to create a solution to the 'grit' >problem of the R8 focusing screens. To recap, perhaps its just a 'problem' for >me, but my perception of the current focusing screens is that they are both >dull and 'grity' as compared to a modern "laser matte" type of screen as >incorporated in other manufactures camera systems. > >For me, I find the 'grit' an annoyence and the lack of brightness to be >undesirable. When I brought up these issues perviously, some of you disagreed >with me siting various raves from writers reviewing the R8 as being amongst >the best of the best in viewfinders. > >I do think that the R8 viewfinder has the potential to be the best of the >best, but was 'shot down' in its performance by the limitation of the current >screens. > >My explorations into a set of solutions for a different screen started with >Maxwell Precision Optics. Bill Maxwell was able to 'treat' a few Leica >replacment screens in order to create the type of brightness increase as >Bettie et al. I must say that I was impressed by the increase in brightness of >the screen. However, the grit problem was still quite obvious. > >I contacted Leica USA and Nils Thoreson to request assistance in reviewing >previous camera models that might have screens that could be adapted forward >to the R8. The SL screen was known to have a very unique performance. It was >also beleived that the R4 screens - from the Minolta era - the originator of >the "laser matte" concept, where superior to later model screens. However, >Nils was unable to find any forward compatability of these previous products. >The screens are not only mechically sized different, but also have optical >focal lenght and correction factors (SL), that are different then the R8. > >A little lost, I was hartened by the recent article in Popular Photography >outlining the history of viewfinder image quality and their assertion that >viewfinder image quality of most camera systems has degraded over the years. >They provided some interesting supporting data with the article. I felt after >reading it that perhaps my perceptions about the 'grit' and brightness of the >R8 screen were not misplaced. > >Seeking further solutions, I sat in a camera store with boxes of camera >screens from different manufactorers camera systems - and different eras of >screens. I was seeking a 'donor' screen that was laser-matte, had focusing >aids (I prefer microprism) and had basic mechanical size compatability with >the R8. > >Unfortunitly, no such luck. The closest I came was in theory only - Canon >designed a laser matte screen with microfocusing aids. It was designated "E- >A", but is out of production. Since I could not get my hands on one, I do not >know if it would have fit, the focal lenght or any of the other issues of >compatability. > >But, it was interesting that it is possible to make such a screen. Most laser >matte screens appear now in autofocus cameras and it was unclear if you could >combine both the laser matte surface and focusing aids - but clearly, you can. > >I also learned in this process that earlier focusing screens were a heck of a >lot nicer then the plastic hunks that we now have. I saw an early Canon screen >that had beautiful GLASS optics cemented to a fine grain screen! It weighed a >bit, but was clearly glorious. > >Now, its obvious that the screens are injection molded and are plastic lenses >at best. Would any of you settle for plastic elements in your favorite Leica >lens?? I have found that even Canon's attempt in making replicated aspheric >lenses using plastic on glass has caused considerable losses in the optics. > >Well, here I am. Lots of effort later and only a half of a solution! But, I >now know that it is possible to make a much smoother and brighter screen and >indeed has been done on previous cameras from other manufactores and even >within Leica. > >I would like to start lobbying Leica to create a new series of replacment >screens for the R8. The development of such screens is neither costly, nor >time consuming - its not free, but the technology is readily available on >contract to other manufactorues. > >Does anyone have first hand knowledge of a name at Solms that would be >sympathetic to my lobbying????????????????? > >I obviously could start at the top and work down, but it would be most helpful >to find a direct connection in to the R8 team and with some one that might be >able to get the ball rolling. Without much effort, I think Leica could tune up >the R8 screens to provide a truly world class view finder. > >If you have any names to suggest along with contact information, please >forward them to me. I would appreciate your help and support. > >sincerely, > >Pete Myers > > \:|:/ (o o) /-------------------o00-(_)-00o-------------------\ I now have a new Email address: smhickel@iserv.net, please change you mailer to the new address Thanks-Steve