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Showing results for tags 'TTL Flash'.
An SF 40 I purchased used is unreliable. It will no longer flash after a few days of light use - died during an afternoon Thanksgiving celebration. Fortunately, I had a Canon EOS 5D mk IV and 430EX III-RT flash to use for flash pictures. But it was very frustrating that the M10 and its TTL flash didn't keep working. Everything lights up and the head zooms manually, but no flash, either from an M10's trigger or the open flash button (the LED ready light). Changed batteries to a freshly-charged set when I got home - still doesn't flash, even though the LEDs light up So bottom line - SF 40 ma