I have heard of the possibility of polarity problems but have never
known of one to actually occur. I suspect that you'd have to resurrect
a flash out of the way distant past in order to find such a problem.
Flash manufacturers certainly wouldn't produce something today (or
perhaps the past 40 years or more) that would be deliberately
incompatible with the cameras on the market.
Given that David's flash units have less then 6 volts trigger voltage
places them as fairly recent.
Dr. Flash
On 11/25/2010 12:26 PM, Jeff Keller wrote:
> Some of the studio units had/have a two prong cord (like a power cord) which
> can be reversed, but David is using a pc connector on his strobes. Are there
> any digital cameras that expect a negative synch voltage?
>
> It would seem that a negative synch voltage would either be due to an
> adapter or cord inadvertently reversing the polarity or a flash manufacturer
> that is assuming a mechanical switch to trigger the flash. Searching the web
> I did find one reference to a Vivitar flash which had a negative center pin
> and wouldn't work on a Canon camera.
>
> Jeff Keller
>
> -----Original Message-----
> From: David Irisarri [mailto:zuiko3000@xxxxxxxxx]
> Subject: Re: [OM] HELP need! Using my E-P1 with flash studio heads.
>
> Hi all,
>
> Thank you for your reply.
>
> Moose, I also think I can use any hot shoe adapter as the voltage is really
> low. I have been using my E-1 all these years and nothing has happened. I
> asked all of you this question as the E-P1 hans´t got any pc sync connector
> and using the flash hot shoe might cause a problem. Plus the polarity of the
> studio flash sync pulse may cause a problem, or not?
>
> -snip
>
> Today I have checked the voltage and it´s 5V so I think I can use a much
> cheaper adapter rather than Olympus $99.99 one. They must be crazy!
>
> I don´t know what to do with polarity. I think this shouldn´t be a problem.
>
> Regards,
>
> Dave
>
>
>
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