Archived posting to the Leica Users Group, 2002/07/13

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Subject: Re: [Leica] OT Flash guide numbers and they work? OT
From: Mark Rabiner <mark@markrabiner.com>
Date: Sat, 13 Jul 2002 00:37:08 -0700
References: <3.0.2.32.20020712104411.013a5488@roanoke.infi.net> <3.0.2.32.20020712180529.01588e14@roanoke.infi.net> <001b01c229f2$b6d60920$633f4d18@gv.shawcable.net> <3D2F8508.FF320E94@domain.com.br> <3D2F9F95.B79AF037@markrabiner.com> <3D2FBED0.198C820B@domain.com.br>

Amilcar de Oliveira wrote:
> 
> Mark Rabiner wrote:
> >
> 
> > I've got a piece of glass wool over mine to make it more inverse square
> > like; less focused; and otherwise more pleasant.
> 
> I'll side with you on the glass wool unfocusing the light and making for
> a more pleasant picture; but I don't think it will make the light more
> inverse square like. That's for point sources - which exist mainly in
> theory...one good thing about photography is that "whatever gets you
> through the night is alright".
> 
> Amilcar
> --
> To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html

What i meant was with the diffusion you'll have something that might
more accurately follow the inverse square law. A bare reflector which
will tend to be focused at some point will for that reason not follow
the inverse square law very closely. Of course the point in which it is
focused on with be much brighter than it's supposed to be.


Mark Rabiner
Portland, Oregon USA
http://www.markrabiner.com
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In reply to: Message from Marc James Small <msmall@infi.net> ([Leica] Cook & Perkins Adapter)
Message from Marc James Small <msmall@infi.net> (Re: [Leica] Cook & Perkins Adapter)
Message from Ted Grant <tedgrant@shaw.ca> ([Leica] OT Flash guide numbers and they work? OT)
Message from Amilcar de Oliveira <amilcar@domain.com.br> (Re: [Leica] OT Flash guide numbers and they work? OT)
Message from Mark Rabiner <mark@markrabiner.com> (Re: [Leica] OT Flash guide numbers and they work? OT)
Message from Amilcar de Oliveira <amilcar@domain.com.br> (Re: [Leica] OT Flash guide numbers and they work? OT)