Sony A77 and external flash
Should be - maybe you can check the actual voltage of the flash with a meter?
I've used old high voltage flashguns with the A700 with no problems. It's one of the unsung virtues of Minolta/Sony cameras - 400v either polarity. A lot of other manufacturers are something like "up to 6V"
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from Black + White +1
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from -The Frozen Lake- ( In Full Colours Only)