Archived posting to the Leica Users Group, 2006/11/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Richard, firstly my apologies if this is an imposition. Can you provide a basic summary of how M viewfinders and eyepieces relate to eye glasses corrections? Each time I have an eye check up or new glasses, I try to quiz my optometrists, however, it is evidently out of their normal area. I understand that the uncorrected viewfinder on an M7 is -.5 dioptre. There are a number of (expensive) corrective lenses but I am steadily going broke having to buy them untested to try out. Should the total of correction (camera plus correction eyepiece)equal the glasses distance correction for the master eye? Or do I have it all muddled? I'm told that my master eye prescription is -.5 with no astigmatism. I need correction for both reading and distance. I use progressives. I have never been able to use glasses with cameras and so would like to have the same correction through the finder, as though they are on. Cheers Hoppy -----Original Message----- From: lug-bounces+hoppyman=bigpond.net.au@leica-users.org [mailto:lug-bounces+hoppyman=bigpond.net.au@leica-users.org] On Behalf Of Walt Johnson Sent: Thursday, 16 November 2006 22:03 To: Leica Users Group Subject: Re: [Leica] M8 Impressions, Pro and Con, correction Richard I had a lens replacement as you described several years ago. First thing I noticed was the world's exciting colors and clarity when view with my right eye. There was noticeable difference between my new right eye and the vintage left one. I was concerned about judging colors accurately but solved the problem by going back to Tr-X. :-) Walt Rockledge, Fl...(where is Ponte Vedra Beach?) Richard Clompus wrote: > Tina, as an optometrist, I've had many patients over the years that > had your exact complaints. Glad to hear your eyes are healthy. You > are explaining the effects of mild changes in the clarity of the > crystalline lens in each eye. As we grow older (and wiser), the > protein in the lens slowly loses its transparency. Things are not as > bright or clear even though your vision may still be 20/20 with > glasses. This is perfectly normal. Over time, the lens can become > dense enough that it decreases vision and it can then be removed > surgically and replaced with a new one made of plastic. After > surgery, Its amazing how patients report how bright colors are before > commenting how clear things look. The cloudy lens that is removed is > called a cataract. Lenses don't become cataracts overnight - it > takes years. Night driving and glare often worsen as the lens > becomes more cloudy. > > Fortunately, rangefinder focusing is easy and autofocusing is even > easier. Glad to hear you're doing fine. Your photographs and > enthusiasm for photography are something to be admired. > > Richard > > Richard Clompus, OD > Ponte VEdra Beach, FL > > > On Nov 15, 2006, at 3:25 PM, Tina Manley wrote: > >> LUG: >> >> Disregard this comment that I made about the M8: >> >> "Either the viewfinder is dimmer than my M7's or my eyes are getting >> worse (a possibility!) It's harder to get the focus right than with >> the M7." >> >> I just got back from having my eyes checked and the vision in my >> left eye has decreased 20% since my last check-up! The doctor >> checked for glaucoma, cataracts, macular degeneration and all kinds >> of stuff and found nothing. I'm going back next week another test >> and some new glasses. My focusing with the M8 should improve >> immensely when I have glasses that match my new decreased vision. >> Getting old sucks but it's better than the alternative!! >> >> Tina >> >> Tina Manley, ASMP, NPPA >> http://www.tinamanley.com >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information