FM-2n and Diopter correction

[David H. Hartman]

I am +2.5 so do I need a +3.5 correction lens then? Or do I need a screw in rubber plus reading glasses?

screwin'rubber ..... hahahaha

Check this out! The diopter marked on the accessory eyepiece may be the combined diopter. As I recall there is a zero diopter eyepiece which is probably a +1 as -1 +1 = 0. Photography in Malaysia would be a good place to check.

Best,

Dave

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You might download a Nikon FM3a manual from Nikon as the FM3a uses the same eyepieces.

[Frank Fremerey]

Thank you all. I wait for the packages from Suisse and Japan to arrive. So much other work to do.

[Frank Fremerey]

https://nikoneurope-en.custhelp.com/app/answers/detail/a_id/953/~/slr-viewfinder-diopter-adjustment

question remaining: which rubber eye piece will work in conjuction with
the correctional facility ;-)

[Matthew Currie]

If  I read the charts right, the FM2 takes the 19 mm. thread, common to the F and F2, etc.  If the lenses are the same as the old F ones, they are all metal, and the original F rubber eye cup fits over them.  That is, as far as I know, the standard rubber eye cup both for the Photomic F and for the DG-2 magnifier, etc. I have an eye cup on one of my F's., but the others are bare.  Glasses scratching is not an issue, because the eye point is not high enough for glasses anyway.

If the newer version has a rubber ring, you will probably have to remove that to put on an eye cup, but you also may not need the eye cup.

The accompanying picture shows an F diopter with an eye cup on it, and the same type F diopter with no eye cup.  The eye cup just stretches over the flange, and is held tight when it's screwed in.

In front of these are a pair of HP diopters.  The left hand one has a small rubber ring glued to it.  The right hand one has a wider metal flange, and the rubber ring (behind it) stretches over it.  I do not know which versions are meant for which cameras or which one of the two version is newer. 

[the solitaire]

The Nikon F3 DE-2 finder also uses 19mm thread. With the DE-3 finder Nikon introduced a 22mm thread for correction eyepieces

[Frank Fremerey]

Post from Japan arrived!

A registered delivery from Japan including diopter is cheaper than the unregistered postage costs from Suisse alone.

Pity: The best way to focus the FM-2 for me is if I screw out both pieces of glass. The Diopter does not help.

[David H. Hartman]

With the standard eye piece off you'll still be at -1 diopter as with it on. I'm not making sense of taking it off.

Dave

[pluton]

Unless Frank's FM2 came with a "0" diopter already in place?  It's pretty easy to tell by looking through the diopter held out at half arm's length.

[Frank Fremerey]

With the installed original glass the VF looks more blurry than without. With the +1 it looks even more blurry

Best VF for manual focus is the D500 and the D600 follows close behind.