Selecting a diopter power

[jimleicam3]

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With my M8 I had a +0.5 diopter as I am very near sighted, and wear glasses to resolve this.  I purchased the diopter way back in 2008, and I know my vision has changed.  When I had a SL, I would move the selection back and forth between 0.0 and +0.5, and -0.5.  So far with my M10, (only had for 4-5 days), my focus seems fine.  

 

How do you select the correct diopter?  How do you know if you really need one?

 

On a slightly different note, I have zero regrets trading my SL for the M 10!!

 

Happy New Year!

 

Cheers!

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[bocaburger]

My shooting eye requires a -3.75 for distance, and a "+2 add" for normal reading distance.  Plus I have astigmatism.  I prefer to keep my glasses on while shooting, otherwise it's a constant juggling act of putting them on and taking them off wherein I miss a lot of shots.  I find that a +1 in conjunction to the distance (upper) part of my progessive glasses works best for me.  Initially I found this out by trial at a Leica store many years ago. 

 

If you know you'll need a + diopter and won't be using your glasses as well, then you could take the camera to a drugstore and try those reading glasses, then order whatever diopter worked. 

 

Perhaps Leica's next M model will include an adjustable diopter, like pretty much every camera including entry-level ones have had for a decade or more.

[MJ_2003]

With my M8 I had a +0.5 diopter as I am very near sighted, and wear glasses to resolve this. I purchased the diopter way back in 2008, and I know my vision has changed. When I had a SL, I would move the selection back and forth between 0.0 and +0.5, and -0.5. So far with my M10, (only had for 4-5 days), my focus seems fine.

 

How do you select the correct diopter? How do you know if you really need one?

 

On a slightly different note, I have zero regrets trading my SL for the M 10!!

 

Happy New Year!

 

Cheers!

I took my M10 (purchased elsewhere) into the Leica store in London and they let me try out each one in turn. If you need one then you will know straight away when the correct one is fitted, it is very obvious.

 

Btw, the diopter I ended up with didn't exactly match my glasses prescription so you do really need to try before you buy.

 

Good luck.

Edited December 28, 2017 by MJ_2003

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 If you need one then you will know straight away when the correct one is fitted, it is very obvious.

 

 

The spec for the one I had some years ago for my M9 also worked for the larger-sized M10 diopter. But you do, I think, need to try options on the camera at a dealer's.

[jaapv]

With my M8 I had a +0.5 diopter as I am very near sighted, and wear glasses to resolve this.  I purchased the diopter way back in 2008, and I know my vision has changed.  When I had a SL, I would move the selection back and forth between 0.0 and +0.5, and -0.5.  So far with my M10, (only had for 4-5 days), my focus seems fine.  

 

How do you select the correct diopter?  How do you know if you really need one?

 

On a slightly different note, I have zero regrets trading my SL for the M 10!!

 

Happy New Year!

 

Cheers!

At a guess, I would say this has been answered about two dozen times in this forum, including the various M FAQ threads.

Either visit your optimetrician and use his try-out lenses in front of the ocular, or visit a well-stocked Leica dealer and try it out. In a pinch use over-the-counter reading spectacles.

[Princess Leica]

For a diopter determination, it Is also important to know which eye is your dominant eye. Not sure this has come up in these discussions. I went to my optometrist today and mistakenly got a diopter correction for my left eye and now must go back to her office, for I later remembered I am right eye dominant. There is an easy way to discover which eye is dominant. Hold out your arm and do a thumbs up gesture, positioning your thumb so it is covering a vertical object like a lamp or vase. Then close one eye. If the object behind your thumb moves out from behind your thumb, you are seeing with your non dominant eye. In my case, when my right eye is open, the lamp doesn't move from my outstretched thumb which is covering it. This is not a medical test. It comes from the atelier where artists learn to achieve perspective and nuance by closing their non dominant eye and measuring a figure or object with their dominant eye. In my case, my dominant eye is the sharper and more able to easily attain focus.

 

Everyone here may already know which is their shooting eye. But my prescription recently changed, and this will change my handling of the camera. It's a good idea to check.

Edited December 29, 2017 by Princess Leica

[paulsydaus]

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You imply that some people should be using a rangefinder with their left eye...?

That is not advisable or good advice I would have thought. The whole point of the rangefinder is to be able to also see with your left eye while using the camera....

 

 

For a diopter determination, it Is also important to know which eye is your dominant eye. Not sure this has come up in these discussions. I went to my optometrist today and mistakenly got a diopter correction for my left eye and now must go back to her office, for I later remembered I am right eye dominant. There is an easy way to discover which eye is dominant. Hold out your arm and do a thumbs up gesture, positioning your thumb so it is covering a vertical object like a lamp or vase. Then close one eye. If the object behind your thumb moves out from behind your thumb, you are seeing with your non dominant eye. In my case, when my right eye is open, the lamp doesn't move from my outstretched thumb which is covering it. This is not a medical test. It comes from the atelier where artists learn to achieve perspective and nuance by closing their non dominant eye and measuring a figure or object with their dominant eye. In my case, my dominant eye is the sharper and more able to easily attain focus.

 

Everyone here may already know which is their shooting eye. But my prescription recently changed, and this will change my handling of the camera. It's a good idea to check.

 

 

Sent from my iPhone using Tapatalk

[Alfaken]

You imply that some people should be using a rangefinder with their left eye...?

That is not advisable or good advice I would have thought. The whole point of the rangefinder is to be able to also see with your left eye while using the camera....

 

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Some of us have little choice. I am left eye dominate and have used my left eye for every camera I have ever owned. If I put my M10 up to my right eye, I see the world through my left eye and don’t see anything with my right. Seeing what’s outside the frame in the viewfinder is enough for me.

 

Ken

Edited December 29, 2017 by Alfaken

[Foxtwo]

At a guess, I would say this has been answered about two dozen times in this forum, including the various M FAQ threads.

Either visit your optimetrician and use his try-out lenses in front of the ocular, or visit a well-stocked Leica dealer and try it out. In a pinch use over-the-counter reading spectacles.

Yes, but because Leica owners are so cool and magnanimous in comparison to the rude louts that inhabit lesser forums, we take great joy in answering the question again. It is yet another opportunity to show that we are gentleman and ladies, more interested in helping our fellow man than pretending to be superior.

 

It’s simply what we do.