In the URL:
http://www.astro.wellesley.edu/lhawkins/photo/olympus.faq.html#ques_P9
I did find east article, than such turn helps:
P9) What is the eye-relief like on the various OM's? How can I improve the
eye relief on my OM-4(Ti)?
Which OM viewfinders are easy to see with glasses on?
That is, which OM cameras have relatively long eye relief
(high eyepoint)? None of them is comparable to the Nikon F3HP.
Michael Covington, a lifelong eyeglass wearer, finds the OM-1
just adequate for use with glasses and the low-end OM's (OM-10,
OM-F, etc.) more than adequate. The eye relief of the OM-2,
OM-3, and OM-4 is not so generous because Olympus added displays
outside the picture area, requiring you to keep your eye closer
to the camera in order to see it. In the OM-4T, and perhaps
others, it is easy for an eyeglass wearer to be totally unaware
of the LCD display, which is not visible at all when looking
straight at the picture area.
You can increase the eye relief (eyepoint) of the OM-3 and OM-4
so you can more easily see the display with your glasses on
using one of the following three methods:
(1) If your eyeglass prescription is fairly weak and you don't
have astigmatism, consider using the camera with your glasses
off, adjusting the diopter adjustment so you can see the
viewfinder image clearly.
(2) With your glasses on, turn the diopter adjustment as far
*counterclockwise* as you can while maintaining a sharp
image. This will give you the maximum eye relief.
(3) If you *really* want an improvement, do the following.
This will not make the OM-4T into a Nikon F3HP, but it will
at least put it into the same class as the Minolta SRT series
or Nikon F3 non HP; you will be able to see *almost* the whole
picture area and display with glasses on:
(a) Get an eyeglass maker to make you a plano-concave lens,
flat on one side, power -2.0D, plastic, rectangular,
11.5 x 17 mm. (Mine cost about $20. Anti-reflection
coated lenses are available at higher cost.)
(b) Using sandpaper, round the corners of the plastic lens
and reduce its size slightly so it will press-fit into
the OM-4T eyepiece frame. Round one of the corners more
than necessary so you will have room to pry the lens out
if you need to do so in the future.
(c) Clean the lens and press it into the eyepiece frame.
(Do not use the Olympus diopter lens holder; the whole
point is that you must add this lens without taking up
any further space.) *CAUTION*: The glass window at
the back of the eyepiece frame is very easily broken;
don't push the lens in so far that it touches it.
(d) Turn the diopter adjustment all the way counterclockwise
and leave it there.
The result: A significant increase in eye relief; a slight
decrease in viewfinder magnification (but it's still much greater
than the Nikon F3HP); and you can no longer use the diopter
adjustment (the image is fixed at -1 D, same as the OM-1).
Thanks to "Michael A. Covington" <covington@xxxxxxxxxxxxxx>
----------
De: PUB:Frank Ernens
Para: olympus@xxxxxxxxxxxxxxx
Asunto: Re: [OM] eyecup / glasses recommendation
Fecha: Miércoles 17 de Febrero de 1999 10:04PM
> With my prescription and the fit of my glasses, I can see fine with both
the
> OM-1 and OM-4.
Caution: it may not always be so. Although I usually shot with glasses
off using my OM-1 and OM-2N - because of stray light, and because often
they were Polaroids - using my glasses I could always see the whole
viewfinder with a little bit of eyeball movement. Late last year
I got a new pair of glasses and can't use them at all with any of my OM's.
The script is almost the same, but the shape of the lens has changed.
Fortunately, I got contacts at the same time. My script is for +2 long
sightedness and astigmatism, and although they are thin the lenses have
a large curvature; I think this is called a meniscus lens.
The OM-4 is much harder to use with glasses, but I got mine after
the contacts. It has a dioptric adjustment, but that doesn't fix
astigmatism. To do that, or if your script is outside the range
of the dioptric adjustment, you can get a lens ground to fit into
one of the eyecups.
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