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Thread: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

  1. #1

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    Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

    Anyone know how much this lens cover? Searched everywhere and I cannot find a thing. Thanks!
    Sorin

  2. #2

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    Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

    I b'lieve it is an f/4.5 tessar type. The f/4.5 tessar type coverage rule of thumb is that the lens will cover 115% of its focal length.

    On another topic, I recall seeing posts by you, possibly on photo.net, up to perhaps a decade ago. Where have you been, are you well?

  3. #3
    In the desert...
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    Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

    I have a 215 mm that covers 8x10

  4. #4

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    Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

    f/4.5, Dave?

  5. #5
    In the desert...
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    Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

    Yes

  6. #6
    8x20 8x10 John Jarosz's Avatar
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    Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

    I have a Paragon Anastigmat 12" but it's f 6.3. It covers 8x10. If anyone is interested I can mount it on the 8x20 and measure the image circle.

    They made 2 versions? One was f 6.3 and the other was f 4.5?

  7. #7

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    Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

    John, they made an f/6.3 Commercial Ektar clone usually sold as Acutar and an f/4.5 jes' plain f/4.5 tessar type usually sold as Paragon. Also a 215/4.8 convertible Plasmat that was sold under many names including Acuton, Ilex Caltar, ...

    Usually doesn't mean always. There were no rules in Rochester and no one followed them.

  8. #8

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    Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

    "There were no rules in Rochester and no one followed them."
    To an old Rochesterian that's the best laugh today!
    See also Kodak's use of the word 'Polymax'.

  9. #9

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    Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

    Quote Originally Posted by John Jarosz View Post
    I have a Paragon Anastigmat 12" but it's f 6.3. It covers 8x10. If anyone is interested I can mount it on the 8x20 and measure the image circle.

    They made 2 versions? One was f 6.3 and the other was f 4.5?

    I'd appreciate it if you would mount it and let me know the diameter of the image circle. I have seen it mounted to a 7x17 banquet and wanted to confirm the circle would cover. My point being that when I obtain a 7x17 that can be mounted horizontally and vertically, I'll want a suitable lens for it. Thanks! John

  10. #10

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    Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

    Lessee now. 7 x 17's diagonal is around 467 mm. A 305 mm lens that covers 467 mm covers an angle of a bit over 74. You're asking a lot of an f/6.3 Tessar, if that's what you meant.

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