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[OM] Re: OM40 / OMG OM2 OM2n and T10 Ring Flash

Subject: [OM] Re: OM40 / OMG OM2 OM2n and T10 Ring Flash
From: Andrew Gullen <andrew.gullen@xxxxxxxxxxxx>
Date: Fri, 03 Sep 2004 09:35:03 -0400
on 2004/09/03 8:29 AM, John Hermanson at omtech@xxxxxxxxx wrote:

> The T-10 should provide the same TTL flash control as your T32, with about
> 1/3 the power.

1/10 - inverse square. At 1/3.2 of the distance, to get the same
illumination for the same aperture would require 1/(3.2*3.2) as much light.

Quite a difference - are the electronics really the same? If so, it must
have to do with the flashtube geometry.

Andrew


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