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Re: [OM] Better Flash recs & handle mounted flash Q

Subject: Re: [OM] Better Flash recs & handle mounted flash Q
From: "Ian A. Nichols" <I.A.Nichols@xxxxxxxxxxxxx>
Date: Thu, 2 Mar 2000 16:43:57 +0000 (GMT)

On Wed, 1 Mar 2000, Gregg Iverson wrote:

> It would be fun to try that much flash power.  BTW, what is the
> relationship between watt seconds and guide numbers.  I don't believe I
> have ever seen a comparison given.

It's not straightforward enough for a straight comparison.  Watt seconds
(or Joules) is a measure of the energy of each flash, the guide number
also depends on the shape of the beam.

-- 
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*             |                                                        |
|  /  | |/-\  |                      Ian A. Nichols                    |
| |   | |   | |                                                        |
|  \-/| |  /  |                  i.a.nichols@xxxxxxxxxx                |
|             *                    iann@xxxxxxxxxxxxx                  |
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