Archived posting to the Leica Users Group, 2013/10/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Tina it is a complex subject. You cannot precisely calculate what will work best for you from the starting diopter (-0.5) and your spectacles prescription). I'd suggest that you take your camera to the doctor with you and explain what's happening. You may be able to try your viewfinder through the various test lenses. What you want is to be able to focus clearly and comfortably on the frame-lines/RF patch which are at a virtual distance of 2 metres (which is what -0.5 diopter means) Some of the complications are that ageing eyes lose their ability to accommodate (adjust to shifts) and how well they work at different light levels and when tired. Astigmatism is a different issue again. A diopter correction eyepiece is spherical and can't correct that error. Good luck. Our demographic all battle this! Cheers Geoff http://www.pbase.com/hoppyman On 30 October 2013 04:19, Tina Manley <images at comporium.net> wrote: > PESO: > > I have an appt with the eye doctor tomorrow because my glasses have quit > working! At least, I'm having more and more problems focusing the camera, > reading road signs, seeing the television. I'm sure it's part of getting > older but I do have some questions for him. > > My glasses are bifocals but I take them off to read and eat. If I used > single focal glasses would it help to focus a rangefinder? > > I can focus my DSLR (Leica 9 with Digital Back) better without my glasses. > Sometimes I can focus the Rangefinder better without my glasses. Would a > diopter help with focusing the rangefinder with or without glasses? > > I hate automatic focus cameras and lenses and will continue to work with my > rangefinders and manual lenses. I may just have to stop down a lot to keep > everything in focus but I like shallow depth of field. > > Getting old is not for sissies! > > I would appreciate any suggestions from others who have faced the same > problems. > > TIA > > Tina > > > > -- > Tina Manley > http:// <http://tina-manley.artistwebsites.com/>www.tinamanley.com > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >