I can't remember which camera this instruction was for, but I remember
reading that one advantage of the shutter speed in line with the aperture
was that if both rings were rotated together, the effect could be changed
without changing the metering. It allowed for aperture or shutter speed
priority. I can't say I can coordinate the OM system that way however.
Gregg
An advantage to it being there is that you have an in-line visual connection
between speed and aperture combinations, not as directly as on the 'tween
lens shutters of the Retina Reflex and the Zeiss Contaflex, which were often
EV coupled, but better than with those models with the twirly wheels on
top - except when, in pre-ttl metering days, they had exposure meters
coupled to them.
The OM-1 wasn't the first focal plane s.l.r. to have its speed dial around
the lens mount. It's sad to admit that the Nikkormat FT was so equipped
several years earlier.
Regards,
Keith Berry
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