Archived posting to the Leica Users Group, 2003/03/08

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Subject: Re: [Leica] Help on Using flash Sf 20
From: Mark Rabiner <mark@rabinergroup.com>
Date: Sat, 08 Mar 2003 13:34:24 -0800
References: <503FA848-51A7-11D7-ABB9-0003936D5D4A@twcny.rr.com>

Ernest Nitka wrote:
> 
> I have an M7 with the SF 20 flash unit - I 'm not sure it's working or
> that I know what I'm doing.  I don't do much flash work which is why I
> need help.
> 
> i attache the SF 20 to the M7 , turn both on with the SF20 being set to
> TTL.  Camera has no film in it so it defaults to ISO 100 I would
> suspect.  My question is that when i shoot towards a wall of books abut
> 8 feet away at f/4 neither the SF20 or the M7 indicate that it was an
> adequate exposure ( the flash icon goes away immediated and the 'ok'
> LED on SF 20 does not lite up)  the SF20 is set on f/4.  why is this
> because prior to shooting the SF20 says i should be ok up to 16 feet (
> GN=66/4 =~ 16).  I have to open up to f/2.8 to get both the SF20 and M7
> to say that there was adequate exposure.  What am I doing wrong?
> 
> Ernie - confused in Syracuse
> 
I assume the flashes low warning light is being conservative as many of
my flashes warning lights have been.
The only way to find out is to run a roll of 100 film in there, at the
books, a roll of 12 and see how it comes out density-wise. My guess is
it will be OK. 

Dark books?


Mark Rabiner
Portland, Oregon USA
http://www.rabinergroup.com
Email: mark@rabinergroup.com
Fax: 503-221-0308
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In reply to: Message from Ernest Nitka <enitka@twcny.rr.com> ([Leica] Help on Using flash Sf 20)