Hi and welcome.
I'm not much of a flash user or expert these days. When I wanted a flash for my Pentax cam, I found a used Pentax flash for a good price and it works well for my needs, so far.
I googled "bower flash+pentax" and got a lot of hits, so maybe you can answer your own question that way.
When I googled "bower 280az" I didn't get any detailed info at all. Can you provide a link?
It looks like B&H is a big Bower seller, so you could probably search there, and read the reviews, for info or call them.
There are def some flash/lighting experts here, so maybe some will reply.
gl
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