Grandagon 200mm Polarizer Questions

Discussion in 'Large Format' started by josephschutz, Oct 1, 2018.

  1. Most Wise Group Members,

    I have a Kaesemann Polarizer 135mm thread for a 200mm Grandagon.

    What is this filter worth?

    How was it sold?

    Any and all comments appreciated.

  2. It is worth whatever the buyer is will to pay! It was sold by us in the USA to camera stores in the USA.

    Since the sky is naturally polarized in some areas of a scene and not polarized in others a polarizer will create banding in the sky of those polarized
    Areas which many find objectionable. For that reason polarizer are not normally recommended for wide angle lenses, like this one if used on 810. The center filter is usually more useful.
  3. Bob, May I respectfully ask, who you are working for?
  4. I have been retired since 2015. I retired after 50 years in the photo industry in retail sales, USAF photography, studio owner, Product Manager and National Sales Manager for various companies like Rollei, Linhof, Rodenstock, Heliopan, B+W, Sinar, Minox, Gene, Novoflex, among many others.

    Why do you ask?
  5. I do remember your name and was trying to remember the context. Perhaps it was related to Linhof center filters for the panoramic cameras.

  6. because you said:
  7. The filter probably has wider applications than just on a 200mm Grandagon, and any decent polariser in 135mm diameter size isn't going to be cheap. However, the 'decent' bit is open to question.

    What make is the filter?
    Is it a linear or circular polariser?
    What condition is it in?

    All the above will affect its value, and in the end, as Bob says, it's worth what someone is willing to pay for it.
  8. A 135mm Kaesmann was only sold as a linear.
  9. Not really on topic, but here's an extract from B&H's 'specification' for a polarising filter using Kaesmann foils:

    • 99.5% Transmission, Kaesemann Foils
    • 2 to 2.8x Filter Factor, +1 to 1.5 Stops
    A bit contradictory, no?
    Surely a 1 stop minimum factor implies a transmission of only 50%?
    So how do you simultaneously get a 99.5% transmission as well?

    Sounds like somebody was just talking out of their bottom!
  10. If the high transmission foils that Heliopan introduced are now used in the Kaesmann then it is possible. But since B+W bought the Kaesmann factory after Dr Kaesmann’s death Heliopan hasn’t been sharing much with them.

    Prior to that purchase a Heliopan did market the Kaesmann and in 135 in linear only.

    If the brass rim is numerically calibrated it is a Heliopan. If it isn’t then it came either from Kaesmann or B+W.
  11. - I have a Heliopan polariser with the graduated edge markings. Does that automatically make it a 'Kaesmann' filter Bob?

    If so, I'm not noticing much difference in transmission between it and the dozen or so other assorted polarisers I have. After all; 1, 1.2, 1.5 stops loss of light - who cares? It's a polariser, and you expect to lose some light.
  12. No, Heliopan offered different types. The latest is the high transmission which are multi coated and have a 1 stop light loss.
    Their Heliopan were not coated as the Kaesmann types are edge sealed in glass and could not be coated, when Heliopan offered them, as the foil inside could not withstand the heat generated while being coated. However, Kaesmann pols were called tropicalized as they were edge sealed in glass and were impervious to moisture/humidity.

    All Heliopan polarizer are calibrated.

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