M10 correction lens II diopter LOST AGAIN

[Jeffry Abt]

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How does one to keep the BLASTED things on the camera? I've now lost two of them @ $195.00 each. 

I am afraid to use locktite on it. I may want to change it for a different power one day.

This is now cost me a good chunk of cash. I hate complaining about money but the things should not come off so easily.

 I've tightened them as far as I dare!

Do you folks have any tips? How hard does one need to tighten them? Am I going to need a tiny torque wrench to get it right?

 

 

[a.noctilux]

Try nail polish,

I use a very small dab (1/100 th of what I need is enough for one normal nail quantity) applied on the last groove (s)

of the thread on the correction lens.

[Gelatino]

Not later than yesterday (5th of march!) I had a bad experience being afraid not be able to take off the +1 diopter of my M10, as I wanted to test focussing without it.

Not the first, I had already lost the eye cup, so  had gently tightened the diopter, whishing not to lose 165 Euro😥 so easily (as some other here " I hate complaining about money but"...).

Tried to remove it but it did not move at all. Tried again forcing a bit, no result.

I left the M until this morning, tried again and don't know why, the diopter unscrewed. I knew it was not glued, so I knew it will turn ...one day.

My practice, sorry a.noctilux, is not to use anything that may avoid taking it off when necessary, but tighten it, not too much 👎, but enough 👍, and some times check that it is not loose and on the way to go.

Out off topic, I  used nail polish after replacing a tiny screw of my 50 summilux  that went off, but this one should not go away anymore.

[Jeff S]

I tighten hard and check regularly, so that’s it’s now habit.

Jeff

[farnz]

5 hours ago, Gelatino said:

I left the M until this morning, tried again and don't know why, the diopter unscrewed.

Quite possibly caused by a difference in temperature when you first tried to remove it and in the morning.  If the diopter's metal surround is a different metal to the metal in your M's eyepiece then they'll probably expand and contract at different rates over the same temperature range, which would be why it was grabbing at the lower(?) temperature from the evening before when both metals would have contracted.  In the warmer(?) morning temperature the metals will have expanded a little and allowed you to remove the diopter.

Pete.

[Jeffry Abt]

I’ve never considered temperature changes... I suppose I need to form the habit of constantly checking it especially during weather changes. But here Texas during 100 degree weather there can be a 25 degree change between outdoor and indoor air conditioned temperatures.

Constant vigilance to keep a part from falling off one’s camera is not a good solution. 

[Gelatino]

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7 hours ago, farnz said:

Quite possibly caused by a difference in temperature when you first tried to remove it and in the morning.  If the diopter's metal surround is a different metal to the metal in your M's eyepiece then they'll probably expand and contract at different rates over the same temperature range, which would be why it was grabbing at the lower(?) temperature from the evening before when both metals would have contracted.  In the warmer(?) morning temperature the metals will have expanded a little and allowed you to remove the diopter.

Pete.

That's not magical enough; I prefer believe that Ernst Leitz's spirit untightened the diopter during the night.😇

[W124]

I use some Edding 780 black to fix it

https://www.edding.com/en-ca/products/edding-780-gloss-paint-marker/

 

[250swb]

Buy the correct sized wrench for when/if you want to take it off, don't use any other type of force, but screw it on hand tight with a dab of purple Loctite applied in one spot only. 

[marcg]

Yes, I think that is the clue. Just a dab of Loctite on one spot only.

I don't know why but I've never had this problem either with an M10 or an M9

[erniethemilk]

Try a few dabs of clear nail varnish, I’ve used this for quite a long time on a diopter on an old X-Pro1 I have and still retain the original diopter I bought for mine many moons ago. 

[01af]

I screwed a +1 dpt correction lens on my M10's eyepiece in Spring 2017 and it's still in place.

[mdemeyer]

12 hours ago, 01af said:

I screwed a +1 dpt correction lens on my M10's eyepiece in Spring 2017 and it's still in place.

Same here...  although not a +1.   😉

[tobey bilek]

Use some tape back side of eyepiece and tape to camera.

I had difficulty with Nikon slide copier seizing on filter threads.  Both are plastic/  It went from very loose to seize easily.   I put a trace amount of plumbing silicone PASTE on the threads which tightened them up and they do not size.