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05-26-2010, 06:00 PM   #1
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hello i just bought a k-x from B&H and i am wondering if i can use my old flash without hurting the camera.
the flash i have is a spectrum 370txp ttl dedication


05-26-2010, 09:17 PM   #2
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Your choice will fall into one or more of the three categories:

(1) A P-TTL flash. It will work with the camera to determine proper flash output;

(2) An "auto" flash. The flash has a built-in meter and can decide the amount of flash output by itself;

(3) A "manual" flash. The flash allow you to manually set the output strength.

Those "dedicated" TTL-only (not P-TTL, without auto or manual setting) flashes won't work.

Last edited by xjx; 05-26-2010 at 09:32 PM.
05-27-2010, 01:21 PM   #3
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We do not carry this brand and I have no experience with it. Sorry.

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05-27-2010, 01:30 PM   #4
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In addition to the 'protocol' issues that xjx described, the other possible issue is trigger voltage. Modern digital cameras are sensitive to extra-high trigger voltage. Some older flashes had insanely high trigger voltages, like 300V or more. The cameras will handle 6-12V OK, pretty much all Pentax-made flashes are in this range. Your flash can be tested with a multimeter. If its voltage is high, there are hotshoe adapters like Wein SafeSync to protect your camera.

The fact this is an older flash with 'TTL dedication' suggests it will not provide full P-TTL automation on a Pentax D-SLR, so you'll be stuck with manual and/or auto-flash.

05-27-2010, 06:51 PM   #5
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You might want to post questions like these in our other forums, since B&H does not carry it. See here: Camera and Studio Accessories -

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