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  1. Re: Any picture examples of color film with old lenses?

    I would have thought that the best way to check the colour rendition of specific uncoated lenses is to eliminate film in the first instance.
    By setting up a test optical bed, with digital...
  2. Re: Any picture examples of color film with old lenses?

    Do you have the serial number of the Cooke Series IIE?

    After WW2, these were all coated by the factory!
  3. Re: 14x17 Tessar Series IIb worth fixing?

    This has a focal length of just under 20”.
    This was sold as a process lens. The F.6.3 Tessars of all makes are the better lenses. Krauss of Paris made an awful lot of the metric version of this lens...
  4. Re: Bausch & Lomb Planetograph F-8 and "Three Focus" lenses?

    There is a well known reprint of the 1898 ROC which I own.
    By 1898 they were only up to model no. 5, unfortunately! ROC was soon taken over by Eastman, but the ROC name was continued until 1907. In...
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    Re: DIY "classic" 8x10 field camera

    Nothing but praise from me!

    I recall the problem of having a good source of prime Wood, but baulking at the problem of excessive waste!
  6. Re: Fungus on antique Lens: Can it be fixed?

    Engraving styles mean Little with Darlot. The same applies to serial Numbers - there are either Numbers/no numbers relating to design or many restarts.

    You are misled by the simple...
  7. Re: Fungus on antique Lens: Can it be fixed?

    The quoted article matches my experience.
    Most RRs/aplanats do have these Quick mountings. They are not designed for servicing. Advances in Optics at the time (1890’s) meant most makers were...
  8. Re: Fungus on antique Lens: Can it be fixed?

    Sorry, but there is a good deal of hearsay and misleading (wrong!) information here already!
    There are a number of lengthy thread on balsam replacement in the DIY section.

    - Don’t use...
  9. Re: Help with a 13" Cooke series II missing a screw

    I think this is the earlier version.
  10. Re: Help with a 13" Cooke series II missing a screw

    Found my dismantled 10.4” Series II - exactly where I left it!
    It is a simple Locking screw which screws into a thread in the Inner barrel. When it is installed, the “sharp” is exactly opposite the...
  11. Re: Help with a 13" Cooke series II missing a screw

    I think it may be the reverse!

    I have seen a few Cooke lenses with extra locking screws which seizes the soft focus adjustment in a particular setting - probably sharp.
    Most of these lenses...
  12. Re: Taylor-Hobson Cooke Series II Portrait Anastigmat 12.75" F/4.5 lens query

    The repair is basically - screw apart, find the steel Ball, clean all surfaces, lightly Oil the contact surfaces , replace the Ball and screw back together.
    Perhaps an hour’s light work.

    Here is...
  13. Re: Adapting a plate camera to take smaller plate holders

    Of course you CAN do what you are illustrating.

    But inserts are traditionally the easiest and most satisfactory Method _ especialy if youhave a tendancy to CHANGE formats!
  14. Re: Taylor-Hobson Cooke Series II Portrait Anastigmat 12.75" F/4.5 lens query

    No.
    These lens deserve a proper clean - solvents will move grime elsewhere.

    I think Ron’s advice is great if you are not confident about the servicing. The lens is very attractive as most on...
  15. Re: Taylor-Hobson Cooke Series II Portrait Anastigmat 12.75" F/4.5 lens query

    Yes, the problem is solidified grease. Can only be Solved by mechanical removal. There is a small Ball bearing which allows the rotation to stop in the 1 - 5 positions. Don’t loose it.
  16. Re: Taylor-Hobson Cooke Series II Portrait Anastigmat 12.75" F/4.5 lens query

    This is an Easy service and is illustrated here in a number of threads!
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    Re: Dating Derogy lens

    There is a lot of variation in Derogy engravings - text, language and depth of engraving.
    I have checked the “le Reve edition” booklet for a similar engraving, without success! But my post #3 shows...
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    Re: Suter serial numbers and dates.

    I believe I have asserted that the Stella series is basically a continuation of the F.5 Rapid Aplanat series.
    I am pretty sure this is not the case!
    Not only do the sizes of the Stella not match...
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    Re: Any info. on Suter lenses

    I have always assumed that the Stella is a rebadged Rapid Aplanet (F5) with Jens glass - as the offered focal lengths were an exact match.

    There is a 42 and a 50cm in the catalogue. I can see that...
  20. Re: Steinheil Munchen Orthostigmat 13,5cm

    isn't it this?

    https://www.largeformatphotography.info/forum/showthread.php?111722-Need-help-Steinheil-Orthostigmat-convertible
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    Re: Petzval in shutter

    There are plenty of Thornton-pickard (T-P) curtain front mounted shutters available which would (and did!) work well with smaller Petzvals.
    The mechanism is simple, robust and suited to DIY repairs....
  22. Re: Iron ring on brass lens - possible to get off?

    Remove lens cells.
    Check aperture leaves are metallic!
    Use propane flame to heat the end with the iron/steel ring up.
    Let the brass assembly fall out due to gravity when the solder is molten-...
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    Re: Old ICA lens question

    I am guessing that the F5.4 is a Goerz Scale rendering of F6.8! F.5.4 is pretty hard to achieve without air spaces in lens cells, which the OP hasn’t mentioned.
    120mm is pretty long for a 6x9...
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    Re: Old ICA lens question

    Yes, this is a F6.8 DAGOR or Zeiss protar clone ( ICA included Zeiss’ camera division!). Note the two mounting lugs on the shutter edge - it has been mounted in a quick release lens board fitting.
    ...
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    Re: Old ICA lens question

    Fungus is very unlikely for a non coated lens of this era.

    Is this mounted in a Compound shutter?

    Focal length?

    Have you considered that the "f.5.4" could be the German/Goerz f scale. I have...
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    Re: Please help with lens identification

    We would only be guessing! Certainly the German f scale, though.
    Goetz would not have released this without details of focal length or size number and “brand”.
    But it does look well made and could...
  27. Re: What is the good camera for wet plate photography

    Most studio type cameras are actually smaller than 11x14 - and are often retro fitted with quite a lot smaller sized backs - even with multi backs giving 4, 6 or 8 images per single sheet of film.
    ...
  28. Re: What is the good camera for wet plate photography

    We try not to mention/“de facto” promote on-going auction listings!
    This is a camera well suited to stationary wet plate and the single side plate holder is perfect for wet plate.
    There are...
  29. Re: What is the good camera for wet plate photography

    There are some words of wisdom here:

    https://www.largeformatphotography.info/forum/showthread.php?88119-Which-camera-for-collodion-wet-plate-photography

    It is question of suitable plate...
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    Re: Please help identify this ULF rig

    This must be a post WW II European studio camera/stand.
    It looks like the original 4 piece square bellows which a hallmark of European cameras. The geared front raise is a typical European feature....
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    Re: Linhof shutter repairs in USA

    Valentin Linhof sold his shutter making business around 1900.

    Linhof often had his trademark added to lenses/shutters that he bought in for Linhof cameras. Inside, they are exactly the same as the...
  32. Re: Easter Corona Weekend - DIY lens boards

    Fun activities but there can be awful lot of torsional energy when using hand held hole cutters. I speak from experience of minor injuries.

    I have a number of cameras with round lens boards,...
  33. Re: Insight Requested on ULF Studio Camera Project

    Thanks for the update!

    Most of the top-of -the-rangeContinental cameras - with bellows of 100cm or more - had a support system to prevent bellows droop or bellows wear on the underside.
    When the...
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    Re: Newbie Questions about Field Camera

    A good move.
    EVen if it doesn’t quite fit, it will provide some basic data about what to look for. My guess is that it has 50/50 chance of fitting perfectly!
    Lancaster were very productive in...
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    Re: Newbie Questions about Field Camera

    It is not just the film plane which might (will) be different. Physical dimensions do vary for different makers.

    I believe there is also a slight difference in size between the early non-patent...
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    Re: Newbie Questions about Field Camera

    The most likely “International” is J.Lancaster & Son, Birmingham made camera which was produced in large numbers.

    See here:
    ...
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    Re: Help Identifying Brass Lens

    A Petzval that covers full plate size will weigh up to 2 kilos, so what you have paid for postage should give you a clue. An RR will be under 0.5 kilo.
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    Re: Help Identifying Brass Lens

    I have found the eBay listing.

    Nowhere does the lister give the size, which suggests this IS a rapid rectilinear - not a Petzval. Not all RR’s are symmetrical. So non-identical front and rear...
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    Re: Help Identifying Brass Lens

    Petzval!

    Towards the end of the 19th century, plain barrel lenses became quite popular.
    Hyatt is a well known retailer. Try the search facility!

    Or here :...
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    Re: Berthiot 520mm f6.3 Special Aviation

    The first thread in this section (a "sticky” ) by Dan Fromm is an excellent entry into source material about French lenses of the 20th century.
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