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04-07-2011, 10:02 AM   #1
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Pentax Flash Gun Compatibility

Hi,

Can somenone finally clear up whether the older Pentax flash units, such as AF 280T, AF 400T, AF 400 FTZ & AF 500 FTZ, will work safely with K10D, K20D, K 5 & K7 digital bodies.

I have read a lot of conflicting information and despite asking Pentax UK - from whom I received no answer! {:-(} - I just don't know and would like to!

Thanks in advance,

Randal Williams


Last edited by jabof33; 04-07-2011 at 10:03 AM. Reason: poor punctuation!
04-07-2011, 11:15 AM   #2
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I have the AF 280T. It works fine with my K-x. Run the flash in one of the auto modes, and when my body has an auto lens on it, everything talks and works fine. TTL mode on the flash does not seem to work for me. Of course, you can run the flash in manual and go that route as well.

I have not used it a lot yet, but have had no issues, once I got the flash working. (Had issue with battery contacts)
04-07-2011, 11:32 AM   #3
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The only one in that group that I haven't tried is the AF400T. I can't recall any Pentax-brand flash as unsafe. There are sites with voltage lists but I don't have them at my fingertips.

Although they won't destroy your camera, they won't work in TTL mode where all the cool features are. That means looking for flashes with manual power control, an auto flash sensor and adjustable head, the most useful features for a DSLR.
04-07-2011, 01:09 PM   #4
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QuoteOriginally posted by jabof33 Quote
Can somenone finally clear up whether the older Pentax flash units, such as AF 280T, AF 400T, AF 400 FTZ & AF 500 FTZ, will work safely with K10D, K20D, K 5 & K7 digital bodies.
In terms of trigger voltage, I think all units in the series AFxxxT and AFxxxFTZ are safe. But you should measure the particular unit just to be sure.

Pentax dropped TTL for p-TTL since K10D and K100D, so AFxxxFTZ flashes can be used only in fully manual mode. If set at TTL, they will fire at full power.

The AFxxxT units are more convenient thanks to their "auto" mode that uses the light sensor on the flash unit.

04-07-2011, 05:04 PM   #5
rfg
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QuoteOriginally posted by Just1MoreDave Quote
There are sites with voltage lists but I don't have them at my fingertips.
This one: Photo Strobe Trigger Voltages ?

According to the voltage data listed there, all the Pentax flashes seem OK.
04-07-2011, 11:12 PM   #6
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Original Poster
Thanks to all - this is most helpful

Randal Williams
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