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Canon 20D Hot Shoe Flash Voltage
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PostPosted: Sat Jan 24, 2009 5:10 am    Post subject: Canon 20D Hot Shoe Flash Voltage Reply with quote
Anyone knows the safe range that can be used on a Canon 20D. I am getting a ring flash (Lester Dine) with voltage measuring 5.6-6.2 at charged and 14 to 19 at burst.

Will it be safe to use on the 20D?


PostPosted: Sat Jan 24, 2009 7:32 am    Post subject: Reply with quote
I raised a question to Canon one year and a half ago regarding the max voltage applyable to the hotshoe, and they didn't answer. I raised the same question to the RICOH people for the Caplio GX100 and they quickly answered that the maximum voltage on the hotshoe shouldn't exceed 12 volt.
From what you're telling I strongly believe that your flash is safe to use on the 20D. Short peak valued of 14-15 volt shouldn't damage the camera.
The warnings are for old units that may have voltages of hundreds of volt.

But to be really shure, we should compare to a Canon flash unit.
Has anyone else had the opportunity of measuring the voltage across the hotshoe contacts on a Canon Flash Unit?.

Kind regards,
Jes.


PostPosted: Sat Jan 24, 2009 9:24 am    Post subject: Reply with quote
http://www.botzilla.com/photo/strobeVolts.html
i beleive 6volts is the maximum
I have read somewhere that you can buy a flash safe adapter to prevent over voltage. or buy one of the cheap radio triggers so there is no contact with the camera.


PostPosted: Sat Jan 24, 2009 3:11 pm    Post subject: Reply with quote
hacksawbob wrote:
http://www.botzilla.com/photo/strobeVolts.html
i beleive 6volts is the maximum
I have read somewhere that you can buy a flash safe adapter to prevent over voltage. or buy one of the cheap radio triggers so there is no contact with the camera.


I agree. The voltage on Canon flash units is around 4 volts.
A flash with a higher voltage will always work and there may appear to do no harm to the camera, but the voltage could have weakened any one of hundreds of circuits.
Many have a problem with a camera and the repair is for a new board. A circuit board can be damaged by a fall a knock and any high voltage.
I would never put anything with more than 6v on the shoe of any modern electronic camera but the flash plug as fitted to a few cameras is safe.
Radio triggers are better for everything.

Are you going into Crime scene work or medical! Laughing


PostPosted: Sat Jan 24, 2009 3:14 pm    Post subject: Reply with quote
The adapter that Bob spoke of is called a Wein "Safe Sync"...Here is a link to the product...

http://www.weinproducts.com/safesyncs.htm


PostPosted: Sat Jan 24, 2009 4:16 pm    Post subject: Reply with quote
Rob Leslie wrote:
triggers are better for everything.

Are you going into Crime scene work or medical! Laughing




Have you ever tried watching CSI Miami for 24 hrs. Laughing Laughing Laughing

One of the TV channel recently was having a CSI marathon. Can't help it since the TV was switched on. Never watched it before, not a bad show at all.

I recently completed a deal for a Lester Dine (Kiron) 105mm macro that came along with LD ring flash on a Nikon N6006 body. They are on the FedEx truck now. Since I don't have any use for the Nikon body, I will probably sells that. I will probably keep the flash and buy a remote trigger which I have never thought of until the suggestions above, thanks.

And I might just be able to use some of the flash units I have been trying to give away, but no takers locally. Any suggestion which cheap remote triggers should I get Smile

Thanks again.
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