Re: Rollei Infrared Filter Question

["Gary Hall" <Robert@xxxxxxxxxxxxxxxxxxxxxxxxx>]

From: James Bielecki <bieleckj@xxxxxxxxxxx>
Subject: Rollei Infrared Filter Question


> We have an old Rollei Series VI infrared filter that doesn't have any
reference on it regarding it's IR designation.  I do believe it's IR cutoff
point is 695nm (from an old book I found) and the filter is dark red,
actually almost opaque.   Can any of you folks give me an idea of what
factor it is?  89B?  87C?
>
> Jim Bielecki
>
>


Jim,

Sounds like  a 89b or just a hair lighter. Should work well with most IR
films.


R. Gary Hall
Infrared and lith Prints...
www.RobertHallPhotography.com



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