Re: Rollei - hellrot red filter

[rrosener@xxxxxxxxxx (Russell Rosener)]

>Hello!
>
>I just bought a Rollei-hellrot red filter (used) for my
>old Rolleicord III, and I will try to take some pictures
>using Konica IR 750 in 120 size. Does anybody know, what is
>the filter factor or what could be the equivalent Wratten
>(or other) filter?
>
>--------------------------------------------------------
>Hannu Jarventaus
>Espoo, Finland
>hannu.jarventaus@xxxxxxxx

If I remember any of my college german "hellrot" means light red in
English. i would bet it is close to a Kodak wratten #23 red filter. You
would probably have a filter factor of +1 to +1.5 stops. I would bracket
quite bit however to be sure you get a good exposure. If I remember the
hellrot is close to a dark orange filter in its IR effect-not total, but
sufficient to notice a change from standard panchromatic film.

Russ Rosener
rrosener@xxxxxxxxxx

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Topic No. 3