Re: Focus corrected IR-filter (was: Another New Subscriber

[jdgoff@xxxxxxxx]

IAt 12:40 AM 12/9/96 +0000, you wrote:
>I will go down tomorrow and look through the inventory that was left when
>the shop I managed went out of business. I am almost certain that there are
>some Rollei IR filters there. While not quite rare, they are uncommon and
>not cheap. As I recall, a mint condition Bay I IR filter with the little
>leather case (and maybe the original box) sold for $40. Anyway, I'll see
>what is there and post to the group, as others may be interested.
>
I am very interested and would be willing to pay that amount for one. Thanks
James Goff 
jdgoff@xxxxxxxx
>----------
>> From: jdgoff@xxxxxxxx
>> To: smidgley@xxxxxxxxx
>> Subject: Re: Focus corrected IR-filter (was: Another New Subscriber
>> Date: Sunday, December 08, 1996 11:35 AM
>> 
>> At 02:58 PM 12/8/96 +0000, you wrote:
>> >On  8 Dec 96 at 1:57, Steve Midgley wrote:
>> >
>> >>     My equipment ranges from 35mm to 8x10 but my favorite camera for
>> >> infrared is the twin lens Rollei - I can use the Rollei infrared
>filter
>> >> (which is focus corrected for IR) and still be able to see to compose
>and
>> >> focus. 
>> >
>> >I once bought such a Rollei focus-corrected filter, but I be damned 
>> >if I can see any effect other than color (color equals a Wratten #89B, 
>> >see the IR-filter list on my homepage).
>> >All tricks and methods to prove it is concave or convex in whatever 
>> >direction were in vain. And I do have the Rollei manual/instructions 
>> >that once again confirm the focus claim.
>> >Yet Rollei Germany is also baffled when I ask them about it, they say 
>> >such a focus corrected filter never existed....
>> >It *can* be made they said, but would be quite expensive.
>> >Would love to get more info on this!
>> >
>> >
>> I have a small booklet that was packed with the Rollei I purchased in
>1952
>> that clearly described the IR filter as focus corrected. I have never
>seen
>> one, but have been on the look-out for one for the last year. I suspect
>they
>> would be expensive and rare. If affordable, this filter would help in one
>> way I use the Rollei with IR. I make panoramic photos using the Rollei
>Pan
>> head. It would be nice to frame/focus through the upper lens without the
>> bother of mounting/unmounting a filter for each shot in the
>series...James
>> >
>> >--
>> >Bye,
>> >
>> >       _/      _/       _/_/_/_/_/       _/_/_/_/_/
>> >     _/  _/  _/               _/       _/  _/  _/
>> >     _/  _/ illem    _/     _/ an    _/  _/  _/ arkerink
>> >                     _/_/_/  
>> >
>> >
>> >
>> >      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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Topic No. 6