Re: IR Filter

[Andy Finney <andy@xxxxxxxxxxxxxxxx>]

>I just recently purchased a Hoya R72 infra red filter. I thought it was
>able to pass some visible light for focusing, but it seems virtually
>opaque to visible light. Is there a Hoya filter which is even more opaque?
>Would that be the R70? There no useful information on the filter factor
>packed with this thing. What would be a filter factor guideline?
>Has anyone used this filter with Konica IR?
>
>Russ Rosener
>
>rrosener@xxxxxxxxxxxxx

I heard that the Konika film has insufficient bandwidth to work with the
Wratten IR filter ... has anybody tried this?

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Andy Finney: andy@xxxxxxxxxxxxxxxx

http://www.demon.co.uk/atsf/

4i web site at: http://www.demon.co.uk/atsf/4i/

'Managing Multimedia' by Elaine England and Andy Finney
is published by Addison-Wesley and is now available
in the UK and the US.

More details are on the web site - http://www.demon.co.uk/atsf/manmult/

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++