[Leica] Caffenol experts - a question

[ernest nitka]

Thanks Marty for the answer to the polarizing filter.

Ernie

> On Jun 9, 2021, at 8:20 PM, Marty Deveney via LUG <lug at leica-users.org> wrote:
> 
> Yes, the 13358 is a linear polarising filter.
> 
> It is hard to specify the characteristics of Caffenol because there is so
> much variation from mix-to-mix and with different brands of coffee etc.  I
> found it exhausted very quickly particularly when the pH was mildly rather
> than strongly alkaline, which would tend to exhaust more quickly, so it may
> help prevent over development.  But I couldn't get it to behave
> consistently and stopped experimenting, because I see no point in having a
> nice camera and valuable film and putting it in unpredictable chemicals.
> 
> Marty
> 
> 
> On Thu, Jun 10, 2021 at 11:35 AM ernest nitka via LUG <lug at leica-users.org>
> wrote:
> 
>> This is a multi part question.  I was out shooting my R7 and was getting
>> bad readings that would normally be 3-4 stops overexposed when in 'A' mode
>> but not in 'P' mode.  While still shooting I figured out what the problem
>> was - taking the polarizing filter off corrected the problem.  I assume
>> that it was a linear polarizer and not circular.  Can anyone verify that A
>> leica 13358 is linear?
>> 
>> So home I went and I decided to try Caffenol developing for 15 minutes.
>> All the frames came out including those that should've been way over
>> exposed.  Is Caffenol for 15 minutes like stand development? Where films of
>> different exposure settings will come out OK/
>> 
>> Sorry for the convoluted question
>> 
>> Ernie Nitka
>> 
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>> 
> 
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information