Re: Flash and IR filters and Konica 750

[Clive Warren <Clive.Warren@xxxxxxxxxxxxx>]

At 5:58 pm +0000 27/1/98, Willem-Jan Markerink wrote:


>On 27 Jan 98 at 14:17, Clive Warren wrote:
>
>> Dear All,
>>
>> Well the experiments with 120 Konica 750 IR have been very interesting.  I
>> can report superb results with the following:
>>
>> Hand Held Meter rating at 9 ASA
>> Hoya 87 IR filter on lens
>
>Mmm....AFAIK, Hoya does/did not have a #87, only a #89B ("R72", very
>dark red, but not opaque) and a #87A ("RM90", the darkest possible
>color in the Wratten series, but claimed to be outside the range of
>HIE, hence definately not compatible with Konica/Ilford/Agfa).
>
>You most likely used this R72 version, right?
>
>Other than that, #87 is indeed the practial upper limit for Konica,
>#87C is quite a bit darker, and causes excessive long exposures.
>
>For more specific transmission data check my homepage:
>
>http://www.a1.nl/phomepag/markerink/mainpage.htm
>


Have checked the filter, of course Willem-Jan is correct in that the filter
has a "R72" marking.

The filter packaging is Hoya but it states quite clearly that the filter is
made by Tokina.

I can recommend this filter for use with Konica 750, however have not yet
tried it out with Kodak HIE.

Printed up one of the 6 x 7 negs yesterday on my 6 x 6 enlarger (so
composition is compromised).  Difficult to print because of high contrast,
however stunning imagery.  When I get a chance next week to print in full
format will add a few pages to my web site.


All the best,

              Clive   http://clive.bel-epa.com


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