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04-26-2010, 02:42 PM   #1
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Kx and Sunpak Auto 422D

At home I have a Sunpak auto 422 D. I had heard that using an incompatible flash on a DSLR could cause a major problem, but I saw in another thread that someone was using this flash with his K100D. would this flash be compatible with my Kx?

04-26-2010, 03:52 PM   #2
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I think the Sunpak Auto 422D is OK to use with Pentax DSLRs.

But you need to measure the trigger voltage just to make sure. I feel pretty safe with anything below 20V.

This is how to measure trigger voltage. If you don't have a digital multimeter, get a cheap one like this. It's useful to have around the house any way.

Or if you have a friendly Radio Shack around, bring your flash (with batteries) over. Someone there may be able to help you.
04-27-2010, 03:26 PM   #3
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thanks a lot for the detailed response
04-27-2010, 04:15 PM   #4
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Just have some more details about the Sunpak.....

IIRC, the 422D has removable module (foot). There is a metal tab under the battery compartment (you have to open the door to see the tab), hold the tab in the "out" position while pulling the module out.

You can get an extension cord for only a few $ from KEH:

Sunpak Flash DEDICATED REMOTE CORD EXT-08 (MX, RX, NE & STANDARD) - KEH.com

With a bracket, you can have the flash off the camera while the light sensor is attached to the camera's hotshoe. This is very convenient for bouncing, macro, ....







04-27-2010, 08:39 PM   #5
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i have the same flash and a k-x
tried a couple shot with it, nothing exploded
at your own risk... but i read somewhere the 422d had like 7 volt trigger so should be safe
04-28-2010, 03:24 PM   #6
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I also have a 422D and I measured it when I first got it. It was less than 6V, I've used it several times on my DS and with no ill effects so far.
04-28-2010, 11:01 PM   #7
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It turns out the unit I had was broken so I took it back and got the fairly inexpensive Vivitar Auto 2600. It's got a pretty simple interface/controls and performs well for what I need it for.. at least until I shell out for a PTTL. Thanks for the input though, It's much appreciated.
04-29-2010, 04:10 AM   #8
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You better check that trigger voltage!
The 2600 is known for very high voltage, 148 volts and up. I would not use it on a DSLR.

04-30-2010, 11:29 AM   #9
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QuoteOriginally posted by wildlifephotog Quote
You better check that trigger voltage!
The 2600 is known for very high voltage, 148 volts and up. I would not use it on a DSLR.
How do I check the trigger voltage?

I've been using it the past couple days with no ill effects.
04-30-2010, 11:44 AM   #10
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You check it with a digital volt/ohm meter. One lead to the center pin, and one to the side contact. You should test with fully charged batteries.

It wouldn't blow a circuit immediately. But over time it can ruin the circuit board.
04-30-2010, 11:53 AM   #11
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QuoteOriginally posted by TAP Quote
How do I check the trigger voltage?
Read my post above (2nd in this thread).
04-30-2010, 01:54 PM   #12
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QuoteOriginally posted by SOldBear Quote
Read my post above (2nd in this thread).
My apologies, I had completely forgotten about your post
04-30-2010, 01:56 PM   #13
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Many flashes can be checked against the list on this site.
Photo Strobe Trigger Voltages
05-02-2010, 02:03 PM   #14
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QuoteOriginally posted by wildlifephotog Quote
Many flashes can be checked against the list on this site.
Photo Strobe Trigger Voltages
Thanks, I actually visited that site just the other day to look into the trigger voltage for the Vivitar unit. Thanks for the warning! The trigger voltage was indeed far too high. I took the unit back and picked up a different 422D.

thanks SOldBear and wildlifephotog for all the help.

Last edited by TAP; 05-02-2010 at 03:37 PM.
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