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

[Jeff Spirer <jeffs@xxxxxxxxxxxxx>]

By the way, the US Rollei organization claims that the Rollei filters, which
were manufactured by Heliopan, which the Rollei people also represent here,
were not focus corrected despite all the literature claiming that they were.
I have had extensive discussions with them on this and they are adamant.  

Never tried one myself, the only one I ever found was $120 used.

At 07:12 AM 12/12/96 +0000, Steve Midgley wrote:
>I have an appointment to go through the remaining Rollei stock of the store
>I managed tomorrow. I will post the availability of the IR filters here
>Thursday night. 
>
>----------
>> From: jdgoff@xxxxxxxx
>> To: smidgley@xxxxxxxxx
>> Subject: Re: Focus corrected IR-filter (was: Another New Subscriber
>> Date: Wednesday, December 11, 1996 6:02 AM
>> 
>> 
>> 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'!]
>> >> >
>> >
>
>
Jeff Spirer
http://www.hyperreal.com/axiom/
Axiom Records/Material Communications


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Topic No. 12