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  1. Re: Diffraction. When does it really matter with LF?

    The nearest library copy is the centre of Canada, that is Toronto. One day I will get there:)
  2. Re: Diffraction. When does it really matter with LF?

    They are from a light exposure point of view, because light obeys the inverse square law , but does that mean that diffraction, which does not rely on the inverse square law, is the same at 1:1 and...
  3. Re: Devere 504 lens mounts for Schneider Componon-S 150mm 5.6 and Schneider Comparon

    Well you can measure the diameter with a ruler: there are only an few sizes for those companies and depending on the age of the lens the sizes might be hard to find on the net. 28, 32.5, 39 and so...
  4. Thread: nega 138 help

    by cowanw
    Replies
    6
    Views
    401

    Re: nega 138 help

    The 10 1/4 between the grooves is what my two 138"s measure. Maybe there is play in the bolt holes of your Nega 138 and you can move them inwards.
  5. Re: Suggest a place that can make some developing tubes

    I use a large (8") funnel on a length of thick rigged slightly curved 3/4 inch clear plastic tubing like from hole depot. the open end fits loosely into the mouth of the Jobo drum which is turning on...
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    Re: Soft-Focus Lens Examples

    Just to be sure: these are ALTERNATE FACTS, eh! as in true only in my mind.
  7. Replies
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    71,938

    Re: Soft-Focus Lens Examples

    Remembering Julia Margaret Campbell
    Unbelievable news!
    Unconfirmed reports suggest that 2
    Great great grand children, direct descendants of Thomas Carlyle, while playing in the attic of the...
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    478

    Re: Water seal for jobo 3010

    The bottom of my 3010 fell out; I siliconed it back.
  9. Re: Do I need a contrast or ND Lens Filter for Verito 18 F4?

    Or use two different film speeds.
  10. Re: Removing sheet film from rotary tubes question

    Hello from Hamilton. Are the tubes filled with water? If not do so and then lift a corner and they will come out easy peasy.
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    Re: Gowlandflex question

    My math is becoming suspect but a 6 diopter monocle or reading glasses should focus at 6 inchesish and help with the focusing hood.
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    142

    Re: Neck strap for EMO Macromax / Leica loupe

    http://scanandprint.eu/13.htm
    See the picture on this page- a sliding hole to slot - good luck!
  13. Replies
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    255,279

    Re: Tiny Format Portraits

    A powerful set of portraits!
  14. Replies
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    1,591

    Re: How Early Could It Have Happened?

    My understanding was that the chokepoint was fixing the image, initially with salt but it was really the identification of Hypo that did it. If so then 1819 would be the date.
  15. Thread: Spotting

    by cowanw
    Replies
    19
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    845

    Re: Spotting

    Very close to neutral, but dependent on mouth health; about 6.8 on average.
  16. Re: Advice needed for stuck lens retaining ring, please

    Your retaining ring has 4 slots. You could make a tool with apiece of wood, like a 4 inch piece of 2x4 and nail in 4 nails whose heads fit the slots with just enough exposure to catch the slots. That...
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    Re: Preparing for a book

    It means the pages finally need to be in the PDF form for which your designer will have the Adobe PDF program or similar. Likely you will give your designer the files in TIFF form and they will put...
  18. Re: Large Format Soft Focus Portrait Image Website

    Very consistent paper colour if not toned.
  19. Replies
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    418

    Re: Help identifying a lens

    ;)
  20. Replies
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    Re: Devere 504 timer advice

    I cannot be sure of a home made timer but I know of two users that use other than Devere timers. My Omega timer works fine.
  21. Replies
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    418

    Re: Help identifying a lens

    There likely will be Series ll f/4.5 Eq To CUS 10. 4 in
    And yes it probably should read Eq FOCUS, but it is very clearly a T not an F.
    And odd that one is painted and the other not
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    Re: A refrigerator for storage

    Yes ground radiation is a real issue over time.
  23. Replies
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    Re: Help identifying a lens

    As it happens I have that exact lens serial number 22960
    10.5 inch f 4.5.
    Mine is painted black but with plenty of brass showing underneath. No soft focus either.
    The beauty ring says Cooke...
  24. Replies
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    2,579

    Re: A refrigerator for storage

    I am pretty sure that my chicken and frozen pizzas do not defrost when the freezer is cycling. Do you have a reference for damage to film in frost free freezers?
    The Conservators of Fine Arts and...
  25. Re: Multivolume Catalog of 19th century photographs

    If you are thinking of just the United States, then you might be thinking of
    The Origins of American Photography. Yale University Press, 2007. ISBN 9780300122862
    and
    An American Century of...
  26. Replies
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    Re: What do I need to use this enlarging lens?

    You need as per http://www.khbphotografix.com/NewUsedEquip2.html
    421-102 Lens Cone 4" (for 150mm lenses) (requires lens disc)
    421-008 Flat Lens Disc with 50mm hole
  27. Replies
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    Re: who do you use to publish your books?

    As Tin Can has mentioned I published a book recently. Over my business life I had collected a number of portraits representing a number of historical events, persons, and techniques. Some of them...
  28. Re: Recent results: warm-tone paper and developer, selenium toning

    Hold alt and type 0162. Who knew?
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    Re: New Book: Eleventyone Portraits 1841 to 1950

    Awwkkk! Don't do that. I paid extra for the non skid surface. :eek:
    I will mail you a print of the image.
    I too have seeing troubles and sought out a readable colour and font that suited, for that...
  30. Replies
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    2,552

    Re: New Book: Eleventyone Portraits 1841 to 1950

    Thank you Tin Can and Ari.
    Some of the images are mildly important from a historical perspective and I will be very pleased if I can make them at least a little bit available to the record.
    And...
  31. Re: Were Verito 18 lenses made in different barrel lengths?

    Yes there are different lengths as well as different placement of mounting flanges.
  32. Thread: Giday!

    by cowanw
    Replies
    6
    Views
    594

    Re: Giday!

    Your dialect would be well recognized in the Ottawa Valley up here in Canada.
    Giday
    Bill
  33. Replies
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    Re: New Book: Eleventyone Portraits 1841 to 1950

    Yes the Hobbit did popularize the word, but it is actually a real word from old English. When i was writing I started with one hundred images, but over the six years of writing it got a bit bigger...
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    Re: New Book: Eleventyone Portraits 1841 to 1950

    I have added the introduction of the book as sample pages, which may help to demonstrate what the point of the book is (apart from over 100 great prints of portraits)

    205651

    205652

    205653
    ...
  35. Re: Sharing mounting the sinar copal shutter on arca swiss cameras

    Just to complete my contribution I have also taken the largest Packard shutter, with a 5 inch hole and sandwiched it between two stainless steel serving dishes (from a nearby restaurant supply store)...
  36. Re: Sharing mounting the sinar copal shutter on arca swiss cameras

    I have done much the same with a Cambo setup but, because all my lenses are on Cambo boards, I also did the reverse in the front and ended the lineup connected to a third Cambo standard to which the...
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    Re: E-Bay: What can I do If the buyer won't Pay?

    I have not really got a dog in the fight except fairplay. The lens maker makes no reference to Summicron, only the commentariat.
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    Re: E-Bay: What can I do If the buyer won't Pay?

    Gentle Irony alert!
    That seems a bit strong. I don't think this is the hill to make a stand on. The patents on the design are expired. The labeling of the lens has nothing Leica about it. Are you...
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    Re: Linhof Ball-Head Mystery...

    like this?
    https://www.flmcanada.com/product/flm-hb-100-half-ball/
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    Re: Durst 138S - asking for detailed instructions

    Well The knob that sticks out straight to the front is the one that fixes the table. I have one of these with a foot peddle and one has no peddle but they both have the knob in front to tighten. You...
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