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  1. Replies
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    Re: Darkroom plumbing advice needed, please

    I added a second spigot to my sink, connected to a fixed mixer and a foot operated valve. The idea being that I can step on the foot valve to deliver tempered water to rinse my hypo laden hands...
  2. Re: Restrictions on wheels in Wilderness Areas?

    I pushed my wife in her manual chair up to the Lady Bird Johnson Grove in Humboldt County back in the late '80s. This was prior to the ADA. It was a difficult push and I remember feeling that we did...
  3. Re: Focusing at the Correct Distance to Maximize the Depth of Field

    Great answer Doremus. It reminded me that Sinar cameras have a mechanical calculator built into the rear standard to do this for you. I was expecting to find a constant ratio between focus spread...
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    Re: Calumet Super CAMBO 6x9 Monorail

    Looks like no. Different order numbers apply. See:

    http://www.cameraeccentric.com/html/info/cambo_1.html

    Makes sense, I know from experience that lens boards are incompatible so it would be...
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    Re: Large 4"x4" Bogen/Manfrotto Hexagonal Head

    When I wanted to mount my magnesium Calumet C1 8x10 to an older Bogen tripod I enlisted the aid of my father-in-law, an amateur machinist. The problem with the Calumet was that while the mounting...
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    Re: Potential LF convert needs advice!

    Revised:

    I agree with Brian. Large Format is not so much more difficult than smaller formats as it is simply different. Loading film holders seems to be intimidating for some folks, but after a...
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    Re: Enlarger lens question

    Very succinctly: Any lens design is optimized for a particular magnification, although some designs hold their corrections well over a wide range of magnifications. Taking lenses are designed to...
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    Re: Enlarger lens question

    You may also consider the maximum enlargement that you would be able to make with such a long lens. My Omega DII allows only about 37 inches (940mm) from negative stage to easel. With a 180mm lens,...
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    Re: The shelf life of exposure meters?

    My recurring recommendation:

    Quality Light Metric Co
    7095 Hollywood Blvd Ste 550
    Los Angeles, CA 90028
    (323) 467-2265

    They repair and calibrate meters including replacing some selenium...
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    Re: Are Two Lenses Enough for My Trip?

    One cautionary tale. This weekend I had a chance to get away and make a few exposures. I had little time to put together my kit and so just grabbed the tripod and bag that I generally have ready. ...
  11. Re: First post: please, some help in choosing my first lens setup

    Well yes, but, while the longer lens does have a larger image circle, it will also require greater shift to take the same picture. In fact when photographing a tall building from a close distance,...
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    Re: Re-silvering elwood

    The Reflector of my 8x10 Elwood has a lot of dark area, but the person selling me mine said that it does not matter. My experience has been that that was not too much of a stretch of the truth. I...
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    Re: Lenses for a 6x9 back?

    Dan, How do you find the 80mm WF Ektar? I don't get much use out of my 6x9 view camera rig, a reducing back and Graflex roll film holder for my 4x5 Cambo. I have 65 and 100mm lenses, plus longer...
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    Re: 150mm lenses for 5x7

    6" Dagor
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    Re: A good cheap light for looking at prints?

    I use these in the darkroom.
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    Re: pronounce it

    Well some Americans, maybe. South Bend's famous university has already been cited. But I have lived my life in two US States that offer an abundance of unconventional pronunciations for...
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    Re: Lens questions from a newbie

    That looks like the B&J monorail variation on the Calumet C1 8x10 camera. The lens board you describe sounds like the C1 board, which was recently available from Calumet, but fortunately is also...
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    Re: 210 Symmar versus 210 G-Claron

    My speculation (totally unsupported by anything that might pass as fact) is that the Repro-Clarons came from an age when workmanship was held in high esteem in its own right and was not totally...
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    Re: 210 Symmar versus 210 G-Claron

    Not stated above is that when used in a process camera where flat original art is imaged onto a flat piece of film all parts of the image are in focus, so aperture shape has no consequence. I bought...
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    Re: question about 150 apo componon hm

    Do you mean the window that illuminates the diaphragm?
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    Re: Diffraction and Depth of Field

    Am I misreading your chart, or do I see diffraction actually improving resolution in certain ranges. That would seem to suggest that you have a sign error somewhere.

    I think that Struan was...
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    Re: Diffraction and Depth of Field

    You may want to read through through following thread:

    http://www.largeformatphotography.info/forum/showthread.php?t=36745
  23. Re: D.O.F? "Infront of focus point" vs "behind focus point"

    Please look at the two graphs attached below representing calculated data and please do not overlook that the two charts have very different horizontal and vertical scales.

    These are an attempt...
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    Re: Newbie Calumet 400 Lens Options

    Be aware of what you ask for. Unless you buy the latest multi-kilobuck lens from Schneider or Rodenstock, you are going to be compromising sharpness. Now, is it a compromise that you will see with...
  25. Re: Converting Omega E3 Cold Light Head to LEDs for $100

    Thanks for posting. I have a very decrepit E3 and that cold light head and have been considering just such a conversion.
  26. Re: D.O.F? "Infront of focus point" vs "behind focus point"

    Like many other rules taught in photography classes "1/3 in front and 2/3 in back" should be recognized as a rule of thumb that conveys some useful guidance, but is not technically true.
    ...
  27. Thread: FORMulae

    by aduncanson
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    Re: FORMulae

    Even symmetrical lenses have a non-zero nodal point separation.
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    Re: Bellows extension for a 180mm macro lens

    Dan gave the applicable formula, but interpreted it incorrectly. f*(1+m) gives the image distance, not the extension from the infinity focus position. Consider the following familiar situations:
    ...
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    Re: Is "normal" perspective the most pleasing?

    ic, Ken's Wikipedia reference includes a link defining a normal lens. It is defined in terms of the print size and the related normal viewing distance so if you are in a mood to question all uses of...
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    Re: Is "normal" perspective the most pleasing?

    Rick,

    I think that your definition of perspective taken from the world of mechanical drawing is essentially the same as that I applied, and I thought that your comments to Ken starting with post...
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    Re: Is "normal" perspective the most pleasing?

    Ken,

    Is there a reason why you chose to make your four photos from the same position?

    Clearly making your four photos from distances proportional to focal length so that the building (or other...
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    Re: Big Center Filter on a Small Budget?

    For a lark, it might be easier to DIY a Goerz Hypergon style fan.
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    Re: Wildest Coast along the Great Lakes?

    I am relieved to learn that it is not Wisconsin that is occupied by Canadians. I would hate to think that foreigners have control of so much of our beer production.

    Oh Yeah, they do.
  34. Thread: KEH quality

    by aduncanson
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    Re: KEH quality

    I am unhappy with them just now. I recently ordered an EX+ used Samsung NX10 body from KEH but called first to see if the manual and software were included. I was plainly (and too quickly, I...
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    Re: What is this... thing?

    Retouching stand?
  36. Re: New To Large Format -- Help Me Choose a Camera

    As Frank said, you are bound to get a lot of conflicting advice. I for one, cringe when somebody inevitably recommends a press camera to a person whose interests are principally studio or landscape...
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    Re: 10x enlargement to 40x50

    Mr. Brown seemed to be suggesting yet a different erroneous way of calculating magnification when he said that a 64 x 80 would be 5x from a 4x5 neg. I am guessing that he took magnification to be...
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    Re: Light meter (and metering) questions

    Not "from the ground glass", but from in front of it.

    Sinar has offered a number of products that work similarly.
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    Re: Light meter (and metering) questions

    Some folks use incident meters, others reflected. To say that one is superior or more natural than the other would be to invite a flame war that would not shed much light.

    That said, I own both...
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    Re: Mounting Tele-Xenar 360mm lens

    I have a 360mm Tele-Xenar with chrome trim, s/n 5034XXX that came to me in a barrel with a flange with a thread diameter of 60mm. I tried to remount the cells into a Copal #3 shutter and found that...
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