Luke_Miller Posted October 11, 2014 Share #1 Posted October 11, 2014 Advertisement (gone after registration) I have an M9 and Monochrom and need a corrective lens for the eyepiece in order to focus properly. Currently I have a +0.5 on the M9 which provides a crisp image in the viewfinder. So I ordered a new +0.5 from B&H for the Monochrom. The one I received was in the correct packaging and the corrective lens was marked + 0.5 but appeared to actually be a different diopter value since it would not allow me to see clearly enough to focus. I returned it for credit. This week I found a used Leica +0.5 corrective lens on the B&H website and ordered it. It arrived yesterday in the correct Leica packaging and has the same issue – it does not appear to be a +0.5 diopter lens since when installed I cannot see clearly enough to focus. If I swap the two +0.5 lenses between the cameras the problems moves to the body with the newly received eyepiece correction lens. I have a small collection of Leica eyepiece correction lenses. My original +0.5 is on the body, the +1.0 is on my 1.25x magnifier, and the +1.5 is on the 1.4x magnifier. All provide the needed correction. So I feel I have some basis for saying that the new "+0.5" is mismarked. I suspect it is actually a minus correction rather than a plus as it makes viewing much worse. Now either I had the bad luck to get back the mismarked one I returned or there is more than one out there. The used one does not appear to be the one I previously returned so I suspect the latter. I am reluctant to call B&H. I'm sure they will take it back and eat the shipping charges like last time, but I don't think that is fair to them. Also I suspect they get a few back from folks who buy an assortment of correction lenses and then return the ones that don't work for them. So when I call and tell them it is mismarked they are very polite, but probably are thinking "yeah right." And the return goes back in stock to await the next customer who needs a +0.5. I have emailed my story to Leica New Jersey and it will be interesting to hear what they say. Quote Link to post Share on other sites More sharing options...
Advertisement Posted October 11, 2014 Posted October 11, 2014 Hi Luke_Miller, Take a look here Strange Eyepiece Correction Lens Issue. I'm sure you'll find what you were looking for!
Jeff S Posted October 11, 2014 Share #2 Posted October 11, 2014 Why not take it to a local optician for assessment….and for comparison to their sample correction lenses. Jeff Quote Link to post Share on other sites More sharing options...
Luke_Miller Posted October 12, 2014 Author Share #3 Posted October 12, 2014 Once I establish a dialog with Leica NJ I'll decide the next step. Hopefully they will have heard of this issue. If not I will send them my corrective lens for assessment. I assume they are made in batches, so it is not unreasonable to suspect that more might be mismarked. The likelihood of me getting the only two in existence seems pretty low, Perhaps I have a collectible. Quote Link to post Share on other sites More sharing options...
Jeff S Posted October 12, 2014 Share #4 Posted October 12, 2014 (edited) If it were mine, I would have already had an assessment easily done yesterday (or sooner)…for free. Then I'd have some facts for Leica. To each his own. Jeff Edited October 12, 2014 by Jeff S Quote Link to post Share on other sites More sharing options...
bocaburger Posted October 12, 2014 Share #5 Posted October 12, 2014 I have a small collection of Leica eyepiece correction lenses. My original +0.5 is on the body, the +1.0 is on my 1.25x magnifier, and the +1.5 is on the 1.4x magnifier. All provide the needed correction. That makes zero sense but if it works for you then great. And have you considered maybe it's your +0.5 diopter that's mismarked? Quote Link to post Share on other sites More sharing options...
Luke_Miller Posted October 12, 2014 Author Share #6 Posted October 12, 2014 That makes zero sense but if it works for you then great. And have you considered maybe it's your +0.5 diopter that's mismarked? The 1.25x and 1.4x magnifying eyepieces actually require a different diopter correction from what is required without them mounted. I believe that has been discussed in threads here. I can focus reasonably well without any correction. But my +0.5 makes everything more crisp. Replacing it with my +1.0 gets me back to about what I see without a diopter mounted. And the +1.5 and +2.0 (which I also have) makes focusing progressively more difficult. Replacing my +0.5 with the last two ones I received make it impossible to focus. So my +0.5 seems to provide optical performance that is consistent with my other corrective lenses, while the two in question do not. Pretty sure they are mismarked or faulty in some way. Quote Link to post Share on other sites More sharing options...
bocaburger Posted October 13, 2014 Share #7 Posted October 13, 2014 Advertisement (gone after registration) The 1.25x and 1.4x magnifying eyepieces actually require a different diopter correction from what is required without them mounted. I believe that has been discussed in threads here. That makes zero sense also because if true then people who don't normally use a diopter on the camera would need one with each magnifier. Think about it. Quote Link to post Share on other sites More sharing options...
Luke_Miller Posted October 14, 2014 Author Share #8 Posted October 14, 2014 That makes zero sense also because if true then people who don't normally use a diopter on the camera would need one with each magnifier. Think about it. I never suggested that it made sense I suspect it depends on ones individual eyesight, but each of my Leica magnifiers requires its own correction. While I can focus my Leicas without any corrective lenses the addition of either magnifier requires a diopter correction if I am going to be able to focus. In my case each magnifier requires a +0.5 increase. So if I need +0.5 on the body, I need +1.0 on the 1.25x and +1.5 on the 1.4x. Quote Link to post Share on other sites More sharing options...
bocaburger Posted October 14, 2014 Share #9 Posted October 14, 2014 I suspect that as you increase the magnification you notice the need for correction more. It then makes sense you would need more correction with each successive magnification. Quote Link to post Share on other sites More sharing options...
Luke_Miller Posted October 14, 2014 Author Share #10 Posted October 14, 2014 I suspect that as you increase the magnification you notice the need for correction more. It then makes sense you would need more correction with each successive magnification. That is my experience. I suspect it is related to attaining "a certain age" when ones eyes become less able to focus close up. Quote Link to post Share on other sites More sharing options...
Luke_Miller Posted October 14, 2014 Author Share #11 Posted October 14, 2014 UPDATE Leica NJ says to send the correction lens in question to their service department for evaluation. Quote Link to post Share on other sites More sharing options...
bocaburger Posted October 15, 2014 Share #12 Posted October 15, 2014 That is my experience. I suspect it is related to attaining "a certain age" when ones eyes become less able to focus close up. Probably so. I've been nearsighted with astigmatism all my life, and since mid-40s started needing bifocals for reading (although being very nearsighted I can still see clearly at a few inches without glasses, handy for close work!). I've always found it more comfortable to just wear my glasses and the heck with the diopters. Quote Link to post Share on other sites More sharing options...
jevidon Posted November 4, 2014 Share #13 Posted November 4, 2014 Probably so. I've been nearsighted with astigmatism all my life, and since mid-40s started needing bifocals for reading (although being very nearsighted I can still see clearly at a few inches without glasses, handy for close work!). I've always found it more comfortable to just wear my glasses and the heck with the diopters. Am I glad this thread was started. I use a +.5 diopter correction lens on my Fuji XPro-1 viewfinder and it crisps the finder frame very well. I was about to order a +.5 diopter correction lens for my M9 when I read this thread. I'll hold off until there is answer to the problem. Standing by..... Quote Link to post Share on other sites More sharing options...
Luke_Miller Posted November 4, 2014 Author Share #14 Posted November 4, 2014 I was about to order a +.5 diopter correction lens for my M9 when I read this thread. I'll hold off until there is answer to the problem. Standing by..... My presumably mis-marked +0.5 is at Leica NJ for evaluation. My last communication with them was they were trying to determine how to test it. Quote Link to post Share on other sites More sharing options...
sblutter Posted November 6, 2014 Share #15 Posted November 6, 2014 I'm also myopic with astigmatism Non progressive (bi-focal) glasses and no diopter works best for me - and quite well at that. I've tried everything... have a bag of viewfinder accessories Quote Link to post Share on other sites More sharing options...
jevidon Posted November 7, 2014 Share #16 Posted November 7, 2014 I'm also myopic with astigmatism Non progressive (bi-focal) glasses and no diopter works best for me - and quite well at that. I've tried everything... have a bag of viewfinder accessories If you have a +0.5 diopter correction lens in your bag that you want to get rid of, please let me know. Reply to my e-mail Quote Link to post Share on other sites More sharing options...
NikonJeff Posted November 7, 2014 Share #17 Posted November 7, 2014 I'm also myopic with astigmatism Non progressive (bi-focal) glasses and no diopter works best for me - and quite well at that. I've tried everything... have a bag of viewfinder accessories Or a -1.5 LMK... Quote Link to post Share on other sites More sharing options...
tobey bilek Posted November 9, 2014 Share #18 Posted November 9, 2014 How do you know the the one you have is the correct power? Quote Link to post Share on other sites More sharing options...
Luke_Miller Posted November 9, 2014 Author Share #19 Posted November 9, 2014 How do you know the the one you have is the correct power? Assuming the question is directed at me My +0.5 slots in correctly between no correction and my +1.0 diopter. I can focus in any of the three situations, but best with the +0.5 The "+0.5" in question does not allow me to focus. So either it is mismarked or both my +0.5 and +1.0 are wrong. Quote Link to post Share on other sites More sharing options...
Luke_Miller Posted November 11, 2014 Author Share #20 Posted November 11, 2014 Leica NJ got back with me today regarding the "+0.5" correction lens and confirmed that it is mismarked. They will provide documentation to that effect, which I will forward to B&H when I return it. Since the last two +0.5 Correction lenses I received from B&H were mismarked I'm not sure what to do if you need one. Quote Link to post Share on other sites More sharing options...
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