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10-10-2015, 04:26 PM   #1
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K-50 and Vivitar 286HV

I have Vivitar 285HV flash that I used while ago when shooting 35mm.. I did measure voltage at the trigger and it is around 8-9 volts at the flash shoe idling and it drops to low 6 volts when fires up.
It is safe to use it with Pentax K-50. What are safe sync voltages at hot-shoe for this camera?


Last edited by cleaverx; 10-10-2015 at 07:07 PM.
10-10-2015, 07:09 PM   #2
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Trigger voltage??

QuoteOriginally posted by cleaverx Quote
I have Vivitar 285HV flash that I used while ago when shooting 35mm.. I did measure voltage at the trigger and it is around 8-9 volts at the flash shoe idling and it drops to low 6 volts when fires up.
It is safe to use it with Pentax K-50. What are safe sync voltages at hot-shoe for this camera?
I have read that an analog VOM is not suitable for measuring the voltage at the hot shoe. A digital VOM, which is recommended, is only about $20 at Home Despot and other big box stores.

IIRC the voltage you cite is OK, but .... check this site: Photo Strobe Trigger Voltages You could query Pentax/Ricoh itself but I doubt that they will say other than use only our flash units.

The age of the Vivitar may make a difference since they probably made some running changes.

I'm away from my "vast collection" of flashes, etc. When I get home tomorrow I'll try and remember to check my AF400T which I've used with my K 10, and post the reading to this thread. I also have an AF280T which is TTL.
10-10-2015, 07:51 PM   #3
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QuoteOriginally posted by grhazelton Quote
I have read that an analog VOM is not suitable for measuring the voltage at the hot shoe. A digital VOM, which is recommended, is only about $20 at Home Despot and other big box stores.

IIRC the voltage you cite is OK, but .... check this site: Photo Strobe Trigger Voltages You could query Pentax/Ricoh itself but I doubt that they will say other than use only our flash units.

The age of the Vivitar may make a difference since they probably made some running changes.

I'm away from my "vast collection" of flashes, etc. When I get home tomorrow I'll try and remember to check my AF400T which I've used with my K 10, and post the reading to this thread. I also have an AF280T which is TTL.
grhazelton
Thanks for the info. I did check it with high quality digital VOM. Please let me know what voltages you are getting from the flashes you mentioned. I would very much appreciate it.

thanks
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