Re: Flash and IR filters and Konica 750

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On 27 Jan 98 at 18:45, Clive Warren wrote:

> I have a Hoya "Infra Red" filter purchased recently after using a 25 for
> some time.  The Hoya filter is not made by Hoya, when I get home next I
> will have a look at the back of the pack, but I have a feeling it is made
> by Tokina....

I think most glass in Japan is made by Hoya, I doubt Tokina made 
their own, especially the more exotic IR stuff.
 
> Any ideas on the IR flash filter - have you tried this successfully?

I experimented a bit with my 0.4mm thick polyester #87C variety, but
only in TTL (EOS), and having a similar filter between the filmrails
(quite tricky in hindsight, as the TTL sensor measures *reflection* 
off the film surface....so the final light hitting the sensors went 
through an #87C three times....8-))
The results were decent, even good considering my wild bracket range 
by varying film speed from 6 ASA to 400....but it could also be that 
the flash was on the limit of output, and fired a full flash each 
time....:-))
Will have to repeat it one day with a all-manual flash 
session....mmm....still have some HIE left from the holidays....;-))


- -- 
Bye,

Willem-Jan Markerink


      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]
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End of Infrared-Digest V0 #369
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