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OPTIONAL VIEWING AIDS
Dioptric Adjustment Lenses S
The dioptric adjustment lens S is an accessory which slides into the grooves of the viewfinder eyepiece from above to correct individual eyesight. With them, eyeglass wearers can photograph without glasses.
The A-1's eyepiece has a standard dioptric adjustment of -1 for normal eyesight. The following 10 kinds of dioptric adjustment lenses are optional accessories: +3, +2, +1.5, +1, +0.5, 0, -0.5, -2, -3 and -4 (diopters). The specified diopters of these lenses are recorded as the real power when attached to the camera, reflecting the -1 power of the camera's viewfinder.
You could select the appropriate dioptric lens by choosing the one closest to the number of diopters in your glasses prescription. But, we propose that you actually look
through the viewfinder after placing the dioptric lens over the eyepiece to be sure you have the best one.
Angle Finders A2 and B
There are some types of photographic subjects for which viewing them through the eye-level viewfinder of the camera is un- comfortable. This is particularly true in the fields of copying, close-ups, photomacro- graphy and photomicrography. Then it might be more convenient to mount one of these angle finders over the camera's eye- piece. Both angle finders rotate 90° for comfortable viewing from above or from the side.
Angle Finder A2 gives a correct image top-to-bottom but reversed left-to-right while the more sophisticated Angle Finder B gives a completely normal image. Both show the entire field of view as well as viewfinder information.