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  1. Re: Is this Fungus ? I can´t identify, need help

    A separation, cleaning and re balsaming will work perfectly, but really this so minor that I wouldn’t bother.

    Here is a similar example - found on EBay!
  2. Re: Is this Fungus ? I can´t identify, need help

    It is patchy breakdown of the glue layer (canada balsam or early synthetics) which gives a Cloudy appearance due to separation of a solid layer on the surfaces of the two lenses. Could be due to...
  3. Re: Detective work with “Extra” Engravings!

    This is early Voigtlander Petzval sold recently.
    It has a nice engraving around the brass lens hood - not quite kosher for Voigtlander. The style of the engraving is absolutely correct and is,...
  4. Re: Archaic/Proto Euryscope - Part 2 Wide-Angled type

    My experience is the larger the format and the greater number of cameras/lenses one owns -the smaller the annual production of negatives and time spent in the dark room.
    I fortunately called a halt...
  5. Re: Archaic/Proto Euryscope - Part 2 Wide-Angled type

    I have been patiently waiting for more contributions for many years - in vain!

    Even D’Agostini’s very long list of identified Voigtlanders up to around 30,000 doesn’t produce any likely wide angle...
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    Re: Lerebours Serial Number - Rice Writing

    I found a rather attractive “wood and brass” photo of 5334 on the net. This is an unusually complete version (with 3 washer stops) and without Waterhouse slot adaption. Have added the details to post...
  7. Re: Brexit trade (custom) treaty - and Global Shipping Program (for EU trades)

    It is all very depressing!

    In the “Good Old Days” a lot of items I bought from North America passed through the Danish Post Office with no demand for the Import VAT. Then the idea of an...
  8. Re: Brexit trade (custom) treaty - and Global Shipping Program (for EU trades)

    I am a bit surprised at the confusion!

    Everything imported into the EU above a nominal value incurs:

    1. The national VAT tax ( for Denmark, this is 25% of the total value - including transport...
  9. Re: A source of valuable data on French lens makers and their products.

    I have always found friendliness and good service from “le reve edition”. I must have received the “very last!!” Jamin/Darlot between Xmas and the New Year. At least, until there are more!
    It is not...
  10. Detective work with “Extra” Engravings!

    I have a number of Jamin and Jamin/Darlot small size CdeV petzval lenses. The earliest of these is from around 1857 - with the very simple block letters JAMIN PARIS engraving and with no mention of...
  11. Re: Any idea about the maker of this Petzval?

    Here is the latest take on Vienna/Braunschweig addition/final move from D’Agostini.

    You might want to remove the footnote ads before the Mods discover them!
  12. Re: Jamin Darlot Convertible "Can Type" vs Cone Centralisateur

    Will be adding some new info/photos during the next few hours - a lot to source but will just add on to this skeleton reply gradually. As this is most comprehensive thread on Jamin/Darlot innovations...
  13. Re: A source of valuable data on French lens makers and their products.

    Well, my Christmas present arrived AFTER Christmas.
    Jamin/Darlot edition. It doesn’t appear to clear up some of the confusion about the range and variations around 1855-1858 but contributes some...
  14. Re: Metal Film Sheaths: how to make them?

    The sheet metals I have access to have been either zink or electroplate (galvanised!) steel. Bending over a straight edge to the 90˚ position, then with as much Care as possible, Down to 180˚ with a...
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    Re: post alternative techniques

    Nice to see you back here Emil - we have been worried!

    I hope your hardware collection has found homes which appreciate them and use them - although, unfortunately not to artistic
    Levels you...
  16. Re: Metal Film Sheaths: how to make them?

    Yes, I have made Them from a range of sheet metals. Allow for more clearance than you calculate/Measure.
    Sheaths are not necessary with book-type plate holders - in fact, they are a hinderance in...
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    Re: Some Soft Focus Lens Sales Information

    My impression is that supply is still low, but demand is slowly going up!

    Kodak 405mm. Very, very clean on Swedish Corona adapted web auction. Equivalent to 1,214 usd.
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    Re: One way to fix lens separation

    There is really very little separation with air spacing development when Canada balsam begins to break down. There are some some small areas close to the edge but by then there is an opaque sandwich...
  19. Re: Beck Biplanat Series II No 8, 17" f/6

    No, but Beck is suspected as having had a relationship with perhaps Steinheil or/and Busch so this is probably one of the many “planat” series aus Deutschland! Beck was really a microscope company...
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    Re: One way to fix lens separation

    Yes - for modern UV synthetic glues where there are very small distances between the hard glue surface/air space/lens surface.

    NO - for Canada Balsam separation. The balsam never becomes a...
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    Re: One way to fix lens separation

    Methylene Chloride (Old fashioned paint remover) is a very nasty item(for the user) and is no longer available in most parts of the world. And the inclusion of ammonia reminds me that I have lost two...
  22. Re: Seroco Camera / C.C. Harrison lens rebuild.

    http://piercevaubel.com/cam/misc/serocoview.htm

    There are CCHarrison threads in the lens section. Post camera photos in the camera section - but lens details and photo in the lens section.
    Use...
  23. Re: Heliar 420mm F4.5 Barrel Lens Disassemble

    No entrance through the rear!
    See photos.
    The front and middle lens are screwed together in one unit which is released by the thread of the “hood”.
    Note my early 36cm has a much more substantial...
  24. Re: A source of valuable data on French lens makers and their products.

    This has the standard layout of the booklets I have - the Hermagis one has a more simple layout with no complex photo montages of different versions/sizes etc.
    Actually, the left- hand page shows...
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    Re: What are these spots?

    Schneideritis.

    See


    https://www.largeformatphotography.info/forum/showthread.php?152105-What-is-quot-Schneideritis-quot-or-What-are-those-white-specks-in-my-lens
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    Re: 16 inch f/3 Hugo Meyer Speed lens

    You might want to check out Jakub’s example here.

    https://www.largeformatphotography.info/forum/showthread.php?157089-FS-Hugo-Meyer-400mm-f3-petzval-lens

    Hugo Meyer sold quite a lot of these...
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    Re: ULF histórica

    https://www.largeformatphotography.info/forum/showthread.php?154350-Any-information-on-the-Holterman-and-Bayliss-Plates-Lens-that-was-used

    And
    ...
  28. Re: Need help to identify brass lenses and LF camera

    it is unlikely you will get an answer as these look pretty anonymous (late 19th/early 20th C.). Photos of details, rather than total lens, might help. The camera is a tailboard type with some...
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    Re: Need Grubb Lens Expertise

    This has already been noted on the literature - mostly in the 19th Century - in Trail Taylor’s collected articles. Grubb is reported as being annoyed, but didn’t get involved in the...
  30. Re: A source of valuable data on French lens makers and their products.

    Good!
    I have the impression that the original print of 100 numbered copies of each booklet has been added too! Only one of booklets I have has a number alongside the “ /100”!
  31. Re: A source of valuable data on French lens makers and their products.

    The Darlot guide was sold put some years ago, but may have been reprinted since. Last time I bought one, I think I wrote through the website mail system requesting confirmation of availability. I...
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    Re: Stuck lens whenever on large Derogy

    The first photo shows a selection of Derogy’s aplanats. The two on the left show the two versions of size no. 4. The top one - with lens in the lens hood assembly - is the early one. The second photo...
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    Re: Stuck lens whenever on large Derogy

    I have the no. 7 - serial no. Is 18661.

    Unfortunately, the front lens cell is part of the (very robust) lens hood assembly. Derogy sold lots and lots of these aplanats, so perhaps a design change...
  34. Re: Strange glass seperation / dirt inside lens element / Need help to identify

    I was just guessing it was the same Kranz I bid on - there are very few this big around!

    Yes this is not a difficult service of the achromat - it will as good as new.The photos on the other...
  35. Re: Strange glass seperation / dirt inside lens element / Need help to identify

    Painting the Ground glass len’s edges Black was very much a UK habit in the 19th Century! Traditional French and most German makers didn’t consider it important and wrote lots of Strange Numbers and...
  36. Re: A source of valuable data on French lens makers and their products.

    I have some concerns about the publishing of these comprehensive booklets on French lens makers in the 19th century. The website seems to be
    unchanged for some time and the “booklets under...
  37. Re: Strange glass seperation / dirt inside lens element / Need help to identify

    There is a side view of the achromat in another of the OP’s threads about his current challenges. This shows “beads” of leaking balsam which are showing the typical white deposit from drying out...
  38. Re: Brass Lens Front Element is loose / Need help

    Agreed. I am surprised Kranz used this system. Damage always happens when amateurs like us try to raise the edge, especially when this is the third time it has been done (for rebalsaming every 75...
  39. Re: Voigtländer Petzval 3B rear lens element is missing / Need help

    Hello guys, I just bought this beautiful Voigtländer Petzval at an auction. Maybe it´s a 3B because the diameter is 2 inches.

    But there´s a problem... The "magnifying" rear element is missing. I...
  40. Re: Strange glass seperation / dirt inside lens element / Need help to identify

    I bid for this very large Kranz Petzval too! But under 1/4 of the winning bid.
    It was described as having heavy separation, but no image of the glass itself!
    The auctioneer is notorious for a very...
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