Greetings once again!
Just the other day I started a mini-thread about focussing problems and so
on. Since then I have been experimenting somewhat with the various
Pentaxes in my collection. I have been using a diopter correction lens in
the clip-on attachment with the rubber eyecup which fits the earlier models
such as the Spotmatics and the SV, S1a and so on.
The problem I encountered was that this attachment removed my eye still
further from the viewfinder than usual so that even less of the focussing
screen was visible. For a spectacle wearer the situation becomes
unpleasant and even untenable.
As an experiment I cut and ground a rectangular (not circular) +1.5
correction lens to fit inside the actual viewfinder of my Spotmatic. Once
shaped and ground to size I held it in place with a little model
cement. The results are spectacular. I am now able to bring my eye right
up to the viewfinder eyepiece and see most if not all of the focussing
screen even with my specs on.
Greatly encouraged I did this also for my MX and this is the greatest
success story of all. The viewfinder is transformed. It is better
brighter and larger than even my Olympus. I am really very impressed. OK
so fitting a lens like this looks somewhat home made but man does it work!
For the information of those who would want to try this: ordinary reading
glasses using acrylic lenses can be cut up and ground to shape with a bit
of practice for a fraction of the cost of glass correction lenses. And the
results are really amazing!
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