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  1. Replies
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    2,874

    360mm f9 Nikkor process lens for 8x10?

    I helped a friend adapt a shutter by making a threaded ring that attached the shutter to the front of the lens. It looked a bit hokey but it worked quite well. The aperture of the lens was still...
  2. Replies
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    2,979

    Optical conundrum for advanced puzzlers

    A quick way to locate pinhole (or other leak) is to put a small light inside the camera and bellows and look at the whole thing in the dark. Any light leaks are immediately obvious.

    I recall...
  3. Need to clean optical cement off of Rodenstock lens

    I've found that household ammonia works well at removing dry adhesives from various glass items. The one optical element from an old test jig I dissassembled had epoxy on it and the epoxy just...
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    8,984

    But Film Now - Stock Up - Won't be around Long!

    I wonder if the rep meant LF film in particular or all film in general? Just looking at local suppliers here in Vancouver Canada, I already see much less LF film available from anyone. Has anyone...
  5. What's your best/worst/most embarrassing LF experience?

    A once in a lifetime opportunity to capture a steam locomotive that was due to pass by about a mile away from home. Got the camera ready and checked out. Decided to use a rollback to capture a...
  6. Printing - change from test strips to 8x10 enlargement

    Are you using a densitometer to check the exposure, comparing the strips and prints side by side or just eyeballing the 8*10? If the latter, I would bet that viewing the strips by themselves or...
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    4,039

    enlarger alignment

    Another contributor to these pages describes a procedure using two mirrors in this document:

    http://members.rpa.net/~choffman/darkmeasure.htm

    I haven't made the mirror with the hole in it yet...
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    2,586

    Need feedback on using paper safes

    The kind I like is or was made in Israel under the Restem name. I also have the same style with a Soligor name. It's a black plastic two drawer gizmo that can be stacked and comes in various...
  9. Replies
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    4,672

    Any Bad Modern LF Lenses?

    Here's a vicarious experience with a modern LF lens. I was going to buy a used Congo lens at one time because it was of recent manufacture with a modern shutter and was about 2/3 of the price of ...
  10. Replies
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    12,829

    12" Com Ektar f/6.3 vs f/4.5

    Well, the Nikkor will have a newer shutter and multicoating but it may not be radically better than the f/6.3.

    I have a 10" f/6.3 Comercial Ektar that I use with a medium format camera as a tele...
  11. Replies
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    3,938

    Cokin filters for Rollei 6008

    Cokin makes a gizmo that clamps on the outside of the lens using 3 plastic screws, but I found it to be a bit hokey so I didn't buy it.

    If the 80 PQ has the bay 6 filter mount (same as the 80 mm...
  12. Replies
    12
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    8,386

    Ultra light ball-head

    I suggest a Leitz ball head. I picked one up at a swapmeet for $40 in beautiful condition because it was missing the top piece that attaches to the camera. It was perfect for me as I machined up...
  13. Replies
    20
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    6,603

    Depth of Field: Long focals versus tele lenses

    Ahem - you can scratch my cunning theory a few posts back. I consulted the books last nite (after posting I'm afraid) and my memory of how tele lenses work was wrong. The only thing I had right ...
  14. Replies
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    6,603

    Depth of Field: Long focals versus tele lenses

    I have a cunning theory about this; perhaps Pete can back it up.

    A telephoto lens in canonical form is a lens group with the desired focal length followed by another lens group to shorten the...
  15. Replies
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    2,125

    Film-trimming expertise

    Three suggestions: - wear gloves to prevent depositing skin oils & other stuff on the emulsion. Wash them a few times to remove any lint. - find a place as dust free as possible. If you don't...
  16. Parkinson's Disease - the photographer's disease??

    The posting about the longevity of photographers got me to thinking. If photographers tend to live longer (except for PJs that get killed in the the line of duty) because they don't do something...
  17. Replies
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    4,733

    Weston Fasting and Hazmat

    FWIW, E Weston was a vegetarian. How devout, I don't know. I recall Ansel Adams jokingly attributing some of Weston's health problems to malnourishment in one of his books (Autobiography...
  18. Replies
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    flat field (symetrical)lenses and focus

    I'll throw my 2 bits in too (hopefully it makes sense; I think it does but it probably won't tomorrow).

    Wisner's article is quite good and I think describes flat field lenses and their Petzval...
  19. Where to find an external shutter for a barrel lens

    I machined up an adapter ring to fit a similar APO-Nikkor to an Ilex synchro (probably #5) shutter. The lens sits in front of the shutter and my friend has to adjust the aperture with the len's...
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    Tonal range of B&W contact prints.

    DJ has an excellent response to the question; I'd like to add and amplify on some of the points. So, FWIW here goes:

    1.) I don't think the negative is the limiting factor in the contrast range...
  21. Replies
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    Komura 400 mm Telephoto Lens

    Komura is quite a top notch lens manufacturer but is surely not in the same league as Nikon. They make broadcast quality TV camera lenses that are in the $$$ range as well as Komuranon enlarging ...
  22. Replies
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    Anyone here using a 12" Commercial Ektar?

    The Commercial Ektars are all threaded in inches. The 10" unit I have is about 2" dia ~ 52 mm. A 52 mm filter sort of works but you can really feel binding. I machined up an adapter ring and it...
  23. Replies
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    5,016

    Cold Light Installation

    I had a spare Condenser head so I installed the coldlight head in that and sealed things up. It's much easier to switch between condenser and cold light now. The non-variable condenser head is a ...
  24. Replies
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    3,364

    Real resolution of films?

    Just some thoughts:

    As it turns out, what we call grain on the image isn't really grain. It's a grouping of a number silver halide cystals. As a result, the resolution can in fact be better...
  25. Replies
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    Condenser bulb size?

    The unit you have sounds like it's about the same size as an Omega Dx. If your condenser lenses are about 6.5-7" in dia and about 3" thick the design parameters will be about the same.

    The...
  26. Replies
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    Filter Size for 10" Ektar

    I have this lens and it does _not_ have the standard metric thread. Kodak is a US company and it made all it's threads based on imperial. It it very close to 52 mm and will work but the pitch is ...
  27. Is it possible to clean mold off of lense elements

    I echo the Romney lens cleaning solution. Equal parts Hydrogen peroxide & ammonia works well. It will remove anything organic. I cleaned an old Kodak lens and except for some slight patterns it...
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    Condensor lens chip

    You might try clear nail polish to fill in/build up the hole. It should have a similar index of refraction and can be removed with acetone (or nail polish cleaner).

    In theory the defects should...
  29. Looking for Info on Meridan (Meridian?) LF cameras.

    Here's a link to an article: http://graflex.org/articles/meridian/

    If the article doesn't say so, it was built in the late 40's in New York for a dealer in two versions.

    I have a 45b (the 2nd...
  30. Where can I get a used Dagor or Ektar in barrel?

    Commercial Ektars definitely came in barrels. I have a 10" CE that I adapted to a Rollei SL66. I don't know where it came from - some sort of strange Kodak camera I'm sure. I don't believe that...
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    Enlarger Lens Light Fall-Off Problem

    Do you have the correct bulb in the light source? When I first got mine, it had a #240 which was much smaller and further away from the condensers. Illumination was good on the 135 but not so...
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    210 Apo-Symmar as convertable?

    1.) Theoretically as a 14" lens it should cover the 13" diagonal of 8*10. Practically it may not because the shutter and lens barrel may cause vignetting.

    2.) The net focal length of a compound...
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