[rollei_list] Re: Filter identification question

Jerry,

If it was an Infra Red filter it would be almost black (very dark red)so
as to only pass infra red light. The inscription would have been
"Infrarot" . I suspect it is a Rollei warm-up (colour conversion for
colour film) filter "R1" also available in strengths R1.5, R2, R5, R11.
These had a female bayonet fitting on the front so that an additional
filter could be attached as required. Similar filters in Blue were
available and as a cased set.

John

-----Original Message-----
From: rollei_list-bounce@xxxxxxxxxxxxx
[mailto:rollei_list-bounce@xxxxxxxxxxxxx] On Behalf Of Jerry Friedman
Sent: 22 June 2006 13:31
To: rollei_list@xxxxxxxxxxxxx
Subject: [rollei_list] Re: Filter identification question

 
Hi!

I hope someone can help me identify a Rollei Bay III filter that I have
with the letters I R on it. It is clear and has bay III fittings on both
sides (male on onme end, female on the other).  Should I assume this is
an infra-red filter?  How is it used and what effect would it have being
used with black and white film?

Many thanks, Jerry F.  


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