Re: Konica IR-120 and Rollei Infrarot

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

On 18 Apr 97 at 13:52, IStudioFL@xxxxxxx wrote:

> In a recent note Mike Golf, a new member to the group, mentioned his
> experieces using the Rollei Infrarot filter and Konica IR-120 in a
> YashicaMat.  Has anyone else had any experience with the Konica-Rollei
> combination.  I'm not really a devotee of Konica IR but if the film works
> well with the Rollei filter we can give it another chance using the
> YashicaMat.  Any comments out there?

FWIW: the Rollei Infrarot Filter is a #89B equivalent.
It is one of the most mysterious filters I know, as its manual
claims that IR focus correction is build in, which is also
repeated/confirmed in Rollei literature. Yet no diopter ever so
slightly can be detected, and the tech reps in Braunschweig tell you
flat out that such a filter has never been made. They also gladly
tell you that such a diopter filter *could* be made, but at a price
(you need to polish this diopter for each single filter, as its
optics must be centered, you can't make one large diopter glass and
cut several filters out of it).
-- 
Bye,

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      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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