[Leica] Film exposure error - how to correct it

[Mark Kronquist]

It's 1.5 stops. Process at ISO 400. ISO 125  negs will be a bit dark.  Bw film quite forgiving 

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> On Aug 16, 2017, at 7:21 AM, Gerry Walden <gerry.walden at icloud.com> wrote:
> 
> I notice that the Ilford order form gives you the option of specifying push/pull processing so I would still be inclined to discuss it with them on the phone and go with what they say.
> 
> Gerry
> 
> Gerry Walden LRPS
> www.gwpics.com
> +44 (0)23 8046 3076 or
> +44 (0)797 287 7932
> 
> 
> 
> 
> 
> 
>> On 16 Aug 2017, at 10:21, Peter Dzwig <pdzwig at summaventures.com> wrote:
>> 
>> All,
>> 
>> I put my M3 back in to use over the vacation. I was exposing the film in it as
>> ASA400 assuming that I had one of my usual films in it.
>> 
>> HOWEVER ( :-( ) I found that I had a roll of 125 ASA FP4+ in it when I came to
>> the end of the roll. When I started using it I had noticed that I had already
>> exposed some 10 frames. So I have 10 frames exposed at 125 ASA and 25 - or
>> thereabouts - exposed as 400 ASA. Most of the shots taken when I was assuming it
>> was 400 were exposed in the region of f8 - f16 at 1/500th.
>> 
>> I send film to Ilford to process. My question is: how should I tell them to
>> develop it?
>> 
>> I think I have the following options:
>> 
>> (i) DON'T - just bin it and write it off to bad luck!
>> 
>> (ii) Develop it as (say) 200 ASA, accept that some will be under-exposed and
>> that the rest will be over exposed and sort it out when I scan the film and play
>> with it in PS or NikFX (or whatever). The short exposure times on the 400 ASA
>> shots may help as they will be on he darker side.
>> 
>> (iii) Develop it as one or the other (125 or 400 ASA)
>> 
>> Any other thoughts/recommendations?
>> 
>> Peter
>> 
>> PS I know that I should shoot a whole roll before i forget what the film is and
>> go off on autopilot :-)
>> -- 
>> 
>> ===========================================================
>> Dr Peter Dzwig                
>> 
>> 
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