RE: Konica exposure with 29

[hannu.jarventaus@xxxxxxxx]

>From: 	George L Smyth[SMTP:GLSmyth@xxxxxxx]
>Sent: 	13. syyskuu 1997 2:23
>To: 	infrared@xxxxx
>Subject: 	Re: Konica exposure with 29
>
>GMA wrote:
>> 
>> Michael Dziak wrote:
>> >
>> > Yes I can clear up the confusion.  George's recomendation is most
>>likely with
>> > a incident hand held meter.  Hannu's is with through the lens
>>metering with
>> > the filter in place.   Deep red filters can vastly distort the
>>accurarcy of
>> > TTL metering depending on the spectural response of the particular
>>camera's
>> > meter.  
>
>The documentation that came with the film states:
>
>"The standard exposure conditions for Konica Infrared 750 file are as
>follows:
>  With a Kenko R-1 filter, the standard exposure conditions are f5.6 @
>1/60 second
>(bright sun, outdoors).
>  With no filter the speed of the film is equivalent to ISO 32."
>
>The Kenko R-1 is a red filter.  So, if you do a little math, with the
>filter we are
>talking about EI 8 and without the filter EI 32.
>
>george

In some earlier posting George said that he had too much contrast in
negatives
and he decided to expose more and develop less. I must say my negatives
are quite contrasty and sometimes they are very difficult to print. 
Anyhow I like these contrasty pictures, so I think I continue my way.
With EI 100 I don't need tripod most of the time, so this is on reason
too.

I have tried the recommended f5.6 and 1/60 combination with my
old Rolleicord and Rollei Hellrot-filter. Sometimes I have metered the
exposure with separate lightmeter (Gossen Multisix) without filter
and using EI 16. With same developers and developing times all these
three exposure methods give almost same density and contrast.

So I am not using EI 100 for the film, it is for my camera (Canon EOS
600)!

Hannu



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