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Thread: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

  1. #11

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    Re: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

    Quote Originally Posted by maxi0909 View Post
    Maybe you can take a look at my pictures, to check if the lens looks like your one
    image of my lens

    Greg
    Attached Thumbnails Attached Thumbnails 14inchlens.jpg  

  2. #12

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    Re: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

    It's not going to cover 20x24. 19" (48cm) Dagor is what you want for that.

  3. #13
    Tracy Storer's Avatar
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    Re: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

    Nobody says the 14" Series III Dagor will cover 20"x24" because it won't. The linked catalog page suggests 18"x22" stopped all the way down which is 90 degrees, which is in fact, the limit of these lenses (90 degrees at f/64 or f/90).
    A 16.5" Dagor (420mm) also f/7.7 will just cover 20"x24" stopped down and will likely render darkened corners. As Karl French tells you, a 19" Dagor is a better bet for a good usable wide angle on 20"x24".
    I share this as a 20"x24" user who owns and uses many focal length Dagors, including 14"(won't cover 20x24), 16.5" (86.9 deg)and 19"(78.8 deg)(both do, read above).
    Quote Originally Posted by maxi0909 View Post
    Thanks for the tip
    But do you know if it is really usable on 20x24 inch? This would be so great, because then I would have a wide angle.
    Tracy Storer
    Mammoth Camera Company tm
    www.mammothcamera.com

  4. #14
    Tracy Storer's Avatar
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    Re: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

    I downloaded and zoomed in on the photo showing your aperture scale. It appears to be marked in "the Goerz System" rather than International stops(the F/stop scale we all know today).
    You can consider your marked apertures to be:
    6 = f/7.7 or f/8
    12 = f/11
    24 = f/16
    48 = f/22
    96 = f/32
    192 = f/45
    Being that it has a 5 digit serial number, and marked in "Goerz System" it's on the early side. I have a black painted one that looks very similar, but with 6 digit ser, and marked in "International Stops". It should perform very well, even compared to a much more modern lens, though being uncoated it'll be a little less contrasty.

    Quote Originally Posted by maxi0909 View Post
    Last edited by Tracy Storer; 15-Sep-2020 at 18:35. Reason: tweak and typo correction
    Tracy Storer
    Mammoth Camera Company tm
    www.mammothcamera.com

  5. #15

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    Re: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

    Quote Originally Posted by Tracy Storer View Post
    Nobody says the 14" Series III Dagor will cover 20"x24" because it won't. The linked catalog page suggests 18"x22" stopped all the way down which is 90 degrees, which is in fact, the limit of these lenses (90 degrees at f/64 or f/90).
    A 16.5" Dagor (420mm) also f/7.7 will just cover 20"x24" stopped down and will likely render darkened corners. As Karl French tells you, a 19" Dagor is a better bet for a good usable wide angle on 20"x24".
    I share this as a 20"x24" user who owns and uses many focal length Dagors, including 14"(won't cover 20x24), 16.5" (86.9 deg)and 19"(78.8 deg)(both do, read above).
    Thanks for your great answer
    Do you mean I could use the 19 inch on a 16x20 camera even wide open in landscape? or just portrait?

    On the other hand I would be happy if you could give me a great tip for a good (and maybe not priceless) wide angle lens for 20x24

  6. #16

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    Re: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

    Quote Originally Posted by Tracy Storer View Post
    I downloaded and zoomed in on the photo showing your aperture scale. It appears to be marked in "the Goerz System" rather than International stops(the F/stop scale we all know today).
    You can consider your marked apertures to be:
    6 = f/7.7 or f/8
    12 = f/11
    24 = f/16
    48 = f/22
    96 = f/32
    192 = f/45
    Being that it has a 5 digit serial number, and marked in "Goerz System" it's on the early side. I have a black painted one that looks very similar, but with 6 digit ser, and marked in "International Stops". It should perform very well, even compared to a much more modern lens, though being uncoated it'll be a little less contrasty.
    Thank you, that clears everything up

  7. #17

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    Re: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

    Quote Originally Posted by maxi0909 View Post
    On the other hand I would be happy if you could give me a great tip for a good (and maybe not priceless) wide angle lens for 20x24
    See post #4 above.

    Lessee now, if you want a 90 degree lens that just covers 20x24 you'll need something around 400 mm. Your only chance is an ancient lens. Scarce, expensive. If you must shoot wide, consider moving down in format.

  8. #18
    Tracy Storer's Avatar
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    Re: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

    Take a good look at the old catalog page Dan Fromm shared a link to. It gives coverage wide open, at moderate stops, and all the way down. It's an early catalog, before some of the shorter Fls were opened up to f/6.8, but the data tracks.

    Quote Originally Posted by maxi0909 View Post
    Thanks for your great answer
    Do you mean I could use the 19 inch on a 16x20 camera even wide open in landscape? or just portrait?

    On the other hand I would be happy if you could give me a great tip for a good (and maybe not priceless) wide angle lens for 20x24
    Tracy Storer
    Mammoth Camera Company tm
    www.mammothcamera.com

  9. #19

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    Re: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

    Quote Originally Posted by Tracy Storer View Post
    Take a good look at the old catalog page Dan Fromm shared a link to. It gives coverage wide open, at moderate stops, and all the way down. It's an early catalog, before some of the shorter Fls were opened up to f/6.8, but the data tracks.
    Sometimes people say that those Catalogues doesnīt tell the real world Coverage. They say that the lenses can go higher in coverage. Thatīs why I asked.

    I opened a new Thread with a question about an other lens I owned, because the seller said it can go higher than the catalogue numbers. Itīs a Voigtländer Euryscop No. 6 Series IV. He said I could use it for 16x20 inch portraits fully opened aperture.

  10. #20

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    Re: Goerz Doppel Anastigmat Serie III No 7 360mm f6 COVERAGE or lens catalogue

    Coverage increases with magnification. Portraits are shot at higher magnifications than shots of distant landscapes.

    That said, there are two coverage concepts. Some say coverage when they mean illumination, i.e., does the lens put enough light in the format's corners. Others say coverage when they mean useful image quality, i.e., does the lens put sharp enough image in the corners.

    You have to ask yourself whether your proposed application -- portraits -- needs good image quality in the corners.

    You also have to remember that sometimes sellers (choose one) don't know what they're talking about or lie.

    The VM says:

    In the USA list in 1915-1916 Series IVa was listed for 50° as:
    No2 10in focus 1.75in dia 5x7in covered
    No3 11.5in 2.33in 6.5x8.5in
    No4 14in 2.5in 8x10in
    No5 17in 3.125in 11x14in
    No6 20in 3.5in 14x17in

    So a 17 inch Euryscop Ser. V. will cover around 16". This is considerably shorter than 16x20's diagonal.

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