[aslyfox]

looks like i need this piece of equipment but I don't know what power

Description:
Use one of the eight available correction lens adapters to adapt the viewfinder image to your eye-sight in case the built-in diopeter adjustment is insufficient. The correction lens adapter M is available in strengths from -5 to +3 diopters.

The Correction Lens Adapter M fits all PENTAX DSLRs and film cameras from the M-series and onwards.

Read more at: PENTAX Diopter Correction Lens Adapter M reviews - Pentax Camera Accessory Review Database



anyone have any suggestions on how to determine the proper one

I had cataract surgery and my long vision is fine but close up I need reading glasses

with my DSLRs I used the diopter correction built in

but I cannot do that with my SLRs

[Not a Number]

You should use as close as possible the diopter that the ophthalmologist optometrist prescribed for your reading glasses. Or try wearing the reading glasses without a diopter on your film cameras.

Or knowing the range of correction on your DSLR you can figure out how much correction each click is, e.g. +/- 0.25 and from the number of clicks from one end or other what diopter correction you have set and get the same or close to the same in the M eyepiece..

[yucafrita]

You should check the built-in eyepiece strength (it's in the manual). I think most Pentax SLRs have something like -1. You should build on top of that. Eg. I use glasses with -1.75 or so for my peeping eye, so I got an additional -1 correction lens.

[aslyfox]

thanks

p. 62 of the Super A [ same as Super Program ] manual says -1.1 Diopter

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Last edited by aslyfox; 02-13-2020 at 05:35 AM.

[AstroDave]

Check with your eye guy!

[aslyfox]

Appointment has been set with my optimist

[Not a Number]

Take your film camera along and explain what you need.

[AstroDave]

Appointment has been set with my optimist

It's always good to deal with an optimist, but I hope it's your optometrist, as well!

[aslyfox]

It's always good to deal with an optimist, but I hope it's your optometrist, as well!

I want good news which is why I said optimist

[ChrisPlatt]

Like you my wife's distance vision is good but she requires reading glasses.
She used a +1 or +2 diopter correction eyepiece.

OTOH I am slightly nearsighted and always used one in the -1 to -2 range.

Nikon once supplied some dealers with an optical instrument much like your optometrist uses to help customers choose the correct diopter eyepiece.

Chris

[Not a Number]

Take your camera along. Go to a brick and mortar pharmacy chain like Walgreen's or CVS that sells inexpensive reading glasses and try the various diopters.

[aslyfox]

he said it was Zero

so the + 1 I am receiving free from a forum member

I have a +1 made for a Nikon EM, but will work on the M bodies.If you PM me your address I'll mail it to you, so you have
a starting point of reference.

should correct the problem

page 62 of the Super A [ same as Super Program ] manual says -1.1 Diopter

[jeallen01]

Allen

I hope the cataract op eliminated any astigmatism in your "shooting eye" as, otherwise, that will also need to compensated for - I have strong astigmatism in my Right eye, and so the dioptre adjustment in my DSLRs is of no use to me (and, in fact, causes more problems that it solves!) in "general use" situations.

[aslyfox]

just checked and on page 47 of the owner's manual for the Pentax ME Super also says

-1.0 diopter eye piece ( accepts corrective eyepieces )

[Fiaskemist]

I also have a newly bought Super A. I wear glasses but I still thought at first that the viewfinder wasn’t as clear as the k-5ii because it’s old. Trying it with glasses on was a nice surprise.

I have -1.75 on my right eye, does that mean that I will need an additional -1 diopter correction lens?