Can I use the Canon 166A flash in a Pentax K100D?—Parand

I just found my dad’s old Canon 166A flash (from a Canon AE-1). I’m going to a wedding tonight and I’m wondering if it’ll work in my Pentax K100D DSLR. Will it work?

Best Answer —Ben H

All of the Canon A-series flashes are safe voltage wise for use with any modern cameras. The Canon AE-1 has electronics that are even more sensitive than those found in most digital cameras, so all of the A-series flashes have a sync voltage of 6 volts.

With that said, though, I’m not sure how the two extra communication pins on the Canon flash would interact with the Pentax. If you are going to use it, I’d suggest using a piece of electrical tape to cover everything in the Pentax hotshoe except the big center contact.

Honestly, though, you won’t really be gaining anything over the built-in popup flash. That’s really the purpose that flashes like the 166A served in the Canon product line in the days before built-in pop-up flash existed. I believe the power is pretty comparable to the pop-up flashes in most SLRs.

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