The OM-1/1n, 2/2n, 10, G, F, 20 & 30 all have "old fashioned"
blade-contact sync switches. The PC/40, 2s, 4, 4t, 3, 3t all use
SCR-controlled synchronization.
John A. Lind wrote:
>
>
> The old high trigger voltage flash units, often found at garage sales and
> in the bins of used odds 'n ends in camera stores, can destroy the flash
> trigger circuits (and perhaps more) in electronic cameras. The OM-1 and
> OM-1n are mechanical with the *only* "electronics" being the
> metering. Consequently they're OK. I *don't* know about the OM-2 and
> OM-2n!! I'd bet money the OM-2S and OM-4[T] use electronic switching, and
> they can be damaged by high voltage flash triggering.
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