ECohen Posted June 5, 2015 Author Share #21 Posted June 5, 2015 Advertisement (gone after registration) Thank you .......You all are all amazingly helpful. I ordered a +1 diopter and will take the camera to the optometrist with the info, that focusing patch is a virtual 2m distance. He has an office full of fancy optical equipment, hopefully he'll go the extra mile. I think I even saw the red dot on one of his tools? I'm thinking the +1 and a second pair of glasses, no line bifocals, reading on the bottom and the proper distance to see the patch, in the proper place for my eye. I'm sure that configuration will work for everyday use as well. Love the camera and this is a small bump on the way to a wonderful rewarding rangefinder experience. Link to post Share on other sites More sharing options...
Advertisement Posted June 5, 2015 Posted June 5, 2015 Hi ECohen, Take a look here I wear eye glasses and on my DSLR I use a +2 on the viewfinder. I'm sure you'll find what you were looking for!
lct Posted June 5, 2015 Share #22 Posted June 5, 2015 My experience is if you require a +2 correction and the Leica viewfinder is -0.5 a corrective eyepiece of +1.5 is appropriate. You mean +2 + 0.5 = +2.5 i guess. According to Leica, « Please note that the Leica M-Viewfinder is preset by default to -0.5 diopters, so anyone wearing glasses of 1 diopter strength would require a +1.5 diopters correction lens ». http://en.leica-camera.com/Photography/Leica-M/Technical-Equipment/Viewfinder-Accessories/Correction-lenses-M Link to post Share on other sites More sharing options...
Exodies Posted June 5, 2015 Share #23 Posted June 5, 2015 You mean +2 + 0.5 = +2.5 i guess. According to Leica, « Please note that the Leica M-Viewfinder is preset by default to -0.5 diopters, so anyone wearing glasses of 1 diopter strength would require a +1.5 diopters correction lens ». http://en.leica-camera.com/Photography/Leica-M/Technical-Equipment/Viewfinder-Accessories/Correction-lenses-M This is very hard to understand. A person with good eyes, uses no correction and gets -0.5 diopters. A person with slightly poor eyes, needs +1 diopter, uses +1.5 diopter correction and gets 0 diopters. Where's the justice in that? I suppose diopter arithmetic doesn't work like real number arithmetic. My eyes have Zeiss lenses configured to give me -2 diopters, I use +2 correction on my camera. I always thought that gave me -0.5 like regular folk; focusing with the RF is fine for me but I need the EVF in low light with 90mm. Link to post Share on other sites More sharing options...
jaapv Posted June 5, 2015 Share #24 Posted June 5, 2015 Thank you .......You all are all amazingly helpful. I ordered a +1 diopter and will take the camera to the optometrist with the info, that focusing patch is a virtual 2m distance. He has an office full of fancy optical equipment, hopefully he'll go the extra mile. I think I even saw the red dot on one of his tools? I'm thinking the +1 and a second pair of glasses, no line bifocals, reading on the bottom and the proper distance to see the patch, in the proper place for my eye. I'm sure that configuration will work for everyday use as well. Love the camera and this is a small bump on the way to a wonderful rewarding rangefinder experience. Yes - but the rest of the viewfinder is at distances from short by to infinity, viewed through a telescope system with an -0.5 dioptre strength (to facilitate the viewing of the projected elements at a virtual 2m.). So he will have to take the accommodation ability of your eyes into consideration. The focus patch will be a combination of anything between 1 and 10 m. (the most common subject distance) and the virtual 2 m. The easiest thing for him to do is to use a few of his try-out lenses between your eye and the viewfinder. Link to post Share on other sites More sharing options...
lct Posted June 5, 2015 Share #25 Posted June 5, 2015 My eyes have Zeiss lenses configured to give me -2 diopters, I use +2 correction on my camera. I'd try +2.5 if i were you. My sight is -1.5 and i use +2 correction lenses. Works perfectly for me. Link to post Share on other sites More sharing options...
ECohen Posted June 5, 2015 Author Share #26 Posted June 5, 2015 The rangefinder image and finder display are set at a "virtual distance" of IIRC 1.5m. Typically, that corresponds to some point in the middle part of progressive lenses, which I find rather difficult to position quickly. My "reading" prescription is also a "+2 add", but to properly see the rangefinder, I look through the upper (distance) part of my glasses, and keep a +1 on the camera eyepiece. That's equivalent to half the correction I need for reading up close. Jaap is correct, the virtual distance is 2m. The 1.5 I was recalling was from Hasselblad V-series. I asked my optometrist what "add" I would need for 2m, she said +1 (I need a +2 add for reading at 18", whatever that is in meters). So I added +1 to the native M eyepiece and bingo, Bob was my uncle. As I said on past cameras I use a +2 and lift my glasses to see the finder. After reading this post I took everything off the camera and I now look through my glasses distance portion.... much, much better. I took Bocburgers advice and ordered a +1 ( for that little extra) I do agree this is trial and error in search of comfort. My bet is that +1 and my current glasses will do the trick. To take it a step further it may be a good idea to slightly adjust my glass lens configuration (position) to have the correct magnification at the best place for looking in the camera. It slows me down to reposition my glasses looking for that sweet spot. With all of your help I'm well on my way to understanding the design of the M as it relates to this issue. Before taking position it never struck me the concept of the "virtual distance focus patch" Cant wait to here what the eye doc says...... Again Thank You all, I really appreciate this group! Link to post Share on other sites More sharing options...
pico Posted June 5, 2015 Share #27 Posted June 5, 2015 Advertisement (gone after registration) Aw, just bring back an M3 viewfinder so that we can see almost 1:1 with both eyes open. This situation is discouraging enough that I'm thinking of switching to external viewfinders for all except 75mm. Link to post Share on other sites More sharing options...
ECohen Posted June 5, 2015 Author Share #28 Posted June 5, 2015 still gota focus ;-) actually none of this was an issue till I hit 39 yrs Link to post Share on other sites More sharing options...
Manoleica Posted June 5, 2015 Share #29 Posted June 5, 2015 Not Off Topic - But close.. About 5 years ago I had a cataract developing on my Left eye.. Had surgery & an Implant.. (Distance) (Can now see a hair on a gnats bum @ 500yards) - M focussing is easy peasy.. Has anyone with focussing issues tried Contacts ? Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/245903-i-wear-eye-glasses-and-on-my-dslr-i-use-a-2-on-the-viewfinder/?do=findComment&comment=2828455'>More sharing options...
pico Posted June 5, 2015 Share #30 Posted June 5, 2015 still gota focus ;-) actually none of this was an issue till I hit 39 yrs I can focus with the right eye then switch to the external finder, unless things are moving quickly. In desperation I once thought of putting a frame over my left eye glass. No parallax correction, but... Link to post Share on other sites More sharing options...
LeicaFFM Posted June 5, 2015 Share #31 Posted June 5, 2015 After reading this post I took everything off the camera and I now look through my glasses distance portion.... much, much better. I took Bocburgers advice and ordered a +1 ( for that little extra) I do agree this is trial and error in search of comfort. I wish you luck with the trial and error. I just started needing glasses this year and so I spent a few hours at my local Leica dealer and tried all different kinds of diopter corrections. I ended up using a correction that is a little different then what theory and my optometrist would have suggested, but it works very well for me. But then again, my optometrist told me to do the trial and error. It still feels very weird to turn blind. I had 20/20 vision until I hit 44 earlier this year. Now my left eye needs a positiv correction and my right eye a negative correction. Link to post Share on other sites More sharing options...
ECohen Posted June 5, 2015 Author Share #32 Posted June 5, 2015 "It still feels very weird to turn blind. " Yes it does..thank god we only need glasses! Link to post Share on other sites More sharing options...
Jeff S Posted June 5, 2015 Share #33 Posted June 5, 2015 Take the camera with you to the optometrist and experiment….the only way to know. Jeff Link to post Share on other sites More sharing options...
bocaburger Posted June 5, 2015 Share #34 Posted June 5, 2015 A further complication is if you have astigmatism, the "spherical equivalent" for a stock Leica diopter will be different than the diopter strength of your prescription. Just FYI, my prescription for my right (shooting) eye is -3.50 (distance strength) x 75 (astigmatism) +2 ADD (reading distance...reduces the distance setting to -1.5) I achieve perfect viewfinder acuity from 0.7m to infinity looking through the top (distance) part of my glasses with a +1 on the eyepiece. That makes the final correction -3.5 - 0.5 +1 = -3. Link to post Share on other sites More sharing options...
jdlaing Posted June 5, 2015 Share #35 Posted June 5, 2015 Take the camera with you to the optometrist and experiment….the only way to know. Jeff Last time I took a Leica to the Optometrist he ran out and bought one. I should get a cut. I've sold more gear for Leica than my dealer. Link to post Share on other sites More sharing options...
jaapv Posted June 5, 2015 Share #36 Posted June 5, 2015 It is indeed weird. I have +2.25 for reading - for years. I always needed +1.5 on the camera, lately it is better to use no dioptre strength at all although my reading strength has not changed. My optometrist tells me that is perfectly normal as the accommodation span of my eye has shifted over the years. Go figure. Link to post Share on other sites More sharing options...
dugby Posted June 7, 2015 Share #37 Posted June 7, 2015 Aw, just bring back an M3 viewfinder so that we can see almost 1:1 with both eyes open. I'm almost achieving this on my M240, by adding the previously mentioned x1.35. The M240 is x0.68 0.68 x 1.35 = 0.92 This works with my 35mm and higher mm lenses. Link to post Share on other sites More sharing options...
ECohen Posted June 11, 2015 Author Share #38 Posted June 11, 2015 The rangefinder image and finder display are set at a "virtual distance" of IIRC 1.5m. Typically, that corresponds to some point in the middle part of progressive lenses, which I find rather difficult to position quickly. My "reading" prescription is also a "+2 add", but to properly see the rangefinder, I look through the upper (distance) part of my glasses, and keep a +1 on the camera eyepiece. That's equivalent to half the correction I need for reading up close. To complete the thought ....My +1 arrived today .....this works like a charm. Thanks to all you a great group and wealth of information Link to post Share on other sites More sharing options...
Jeff S Posted June 11, 2015 Share #39 Posted June 11, 2015 As noted elsewhere, the virtual distance of the focus patch is 2m, not 1.5m as you quoted above, but the concept is the same. While the +1 works fine for you, only way to know if it's the best it can be is to experiment with your optician….then hope your eyes don't change, which can happen daily. Positioning your eye will become second nature. Jeff Link to post Share on other sites More sharing options...
ECohen Posted June 12, 2015 Author Share #40 Posted June 12, 2015 I guess the point is: In the past I lifted my glasses to view and used a +2 diopter that work great with auto focus . I was looking for suggestions as to how others used their camera. I like the idea of not lifting my glasses. Today with the +1 and my glasses it was very easy and quick to shoot. Although I am using +1 and my glasses being progressive, I probity don't hit the same spot each time. I do consider my issue solved because it's easy to focus, fun to use and...I can see fine. Also my success rate is where I think it should be. I'll keep you posted as I'm going to the eye doc next week .......taking the camera and all the info I have learned. As luck would have it the tech is an avid photographer and excited to see the MP240 and most willing to help me . I'm curious as to where this "optimum viewing " goes from here....from the point of view of an eye doc. Great camera and so much fun to use....and you guys are the best! Link to post Share on other sites More sharing options...
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