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  1. Replies
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    Re: New Autofocus 4x5"

    That would be sweet! Can it refocus... say if you aim at subject's eye, recompose but they move slightly back, you'll re-focus on their eye because the focus aim followed?
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    Re: Point Reyes Advice?

    Here's some of the HAER photos of the radio stations...

    https://www.loc.gov/resource/hhh.ca3143.photos?st=gallery
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    Re: Point Reyes Advice?

    I was thinking going inside, getting close-ups of the gear. Didn't one of us do that?
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    Re: Point Reyes Advice?

    Please make sure you have enough water.

    Also take the keys to your car. We had a friend leave them in his friend's car glove compartment thinking it would be fine. It was but his friend's car was...
  5. Re: Pentax V, three cell meter light adjustment or replacement.

    I don't know if a brighter bulb would hurt!
  6. Re: BTZS / TMAX / XTOL 1:1 Film Density Test Question

    Thanks! Got the data from your spreadsheet! I like to remove B+F when graphing, but BTZS wants you to include it. Ralph Lambrecht also has a spreadsheet to accompany Way Beyond Monochrome which is...
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    Re: BTZS Tubes in daylight

    It took about 10 minutes to get the image density built-up by normal developing... how much additional do you think happens in a few seconds? Not enough to measure.

    Alkaline fixer is the...
  8. Re: BTZS / TMAX / XTOL 1:1 Film Density Test Question

    mpålsson,

    You say you saw: "ISO triangle came out to be very close to the 13’30” curve"

    That's the developing time I get when I meet the ISO triangle for TMAX 100, TMY2 and TRI-X in D-76 1:1....
  9. Re: Pentax V, three cell meter light adjustment or replacement.

    I've joined the discussion from time to time... There are lots of complaints about the light, I know.

    Be sure to judge the bulb in light levels so low that the spot you are reading has a scale...
  10. Re: Question for chemistry--especially D-23--experts

    One day you will be facing a deadline (like a friend's birthday and you want to give them a portrait), on your last batch of chemicals, and all the camera stores are closed...
  11. Re: Question for chemistry--especially D-23--experts

    If you have a sensitometer and densitometer, you can figure it out. Practically everyone has said it's not worth it and I agree.

    But I have done a similar test and know how to do what you are...
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    Re: Foot candle to aperture and ISO.

    It is the reciprocal, and you want the square root of the arithmetic film speed. And right Weston meters indicate candela per square foot. Shutters mostly leave off the 1/ . If there is time the...
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    Re: Foot candle to aperture and ISO.

    Right. Since a Weston Master indicates that:

    Take the square root of the film speed and use that for your f/stop.
    When you have taken an average reading with a Weston Master light meter...
    Set...
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    Re: Zeiss Protar 8.5cm f18 Bill Brandt lens

    There is an ugly one on eBay for under $100 - worth the experiment!
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    Re: Zeiss Protar 8.5cm f18 Bill Brandt lens

    I got a Bausch & Lomb 4x5 Protar V 3 1/2 IN f/18 for the purpose of experimenting in the style of Bill Brandt

    Think he used 5x7 film in his old detective camera though - which would take in more...
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    Re: Foot candle to aperture and ISO.

    Ansel Adams tells how to convert foot candles to f/stops and shutter speeds in your head.

    Use the square root of the film speed for the f/stop and use the footcandles for the shutter speed.
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    Re: water filters

    Haa exactly! Used to have a reverse osmosis filter and this served well for the final rinse. But after a couple leaks I decided I didn't want to take any more swim tests and I shut the thing off and...
  18. Re: Precision and Accuracy in LF Photography: How much is enough?

    @jp I like the precision/accuracy scale. The one with no precision and no accuracy should have fewer marks on the target though (because some will miss the entire dartboard).

    I see I fall into the...
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    Re: Exposing A Stouffer T2115 Onto Film

    Tape the Stouffer strip to a 4x5 piece of black construction paper with a stripe cut out of it to let the light through the strip.
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    Re: Removal of graphite from aperture blades

    Just don't use those orange capacitors that Nakamichi used in their cassette decks. Use the capacitors that EG&G used in their sensitometers.
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    Re: Mounting without a press?

    I recommend Yes! A Stick Flat glue. I keep this paste in my finishing box.

    Takes a bit of practice but is quite good fo an occasional mounting
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    Re: SEI Exposure Photometer

    Are you sure the bulb is not in there? If it is not there you will see a hole where the bulb would go. You could aim a bright flashlight in there. If the ammeter needle moves, even just a little, you...
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    Re: "vintage" safe light

    Nice - box too! I've been watching for one of these, didn't think further into what would happen if I lit it.
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    Re: Developing Tri X 320 (4x5) in D76 1:1

    I made the same mistake Stearman. Anyway develop it more than 9 but less than 13:30 (I develop all my film too long compared to most other people) and you'll be fine.
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    Re: Photographing stars, 4x5

    The LEAH telescope at Chabot Observatory has Graflok back.
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    Re: Developing Tri X 320 (4x5) in D76 1:1

    OK I see 9 minutes in massive dev. They don't track aim contrasts so it's hard to tell. I use tray with several sheets shuffled. That extends the developing time because each sheet only sees fresh...
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    Re: Developing Tri X 320 (4x5) in D76 1:1

    13:30 is my standard time for Kodak's film in D-76 1:1 at 20C, it gives me an aim contrast of 0.62 (ASA parameters).

    This aims for normal subject luminance range on diffusion enlarger for Grade 2...
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    Re: T-Max and D76

    Press photographers want to get their film developed in less than 13 minutes 30 seconds, so they use D-76 full strength. The large format photographers do not need the "fine grain" results that 35mm...
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    Re: Find dev time without enlarger

    Hi tomwilliams,

    There are two chief reasons for Zone System photographers to downrate film (for example use IE 64 with ISO 125 film).
    1. The speed point from metered point in the Zone System is 4...
  30. Re: An old friend offered us his D-2 he no longer uses.

    I had the same thing happen... Welcome to the club. I still like my old crank-less D-II and I keep the new D-2 in the rafters where one day I hope to give it away.
  31. Thread: Pay Pal news

    by Bill Burk
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    Re: Pay Pal news

    That doesn’t seem like anything nefarious. I wouldn’t want to ship to someone who reversed the charges
  32. Re: Calibrating a Zone VI compensating developer timer

    Note for future reference: Picker writes about the compensating timer in newsletter number 41 December, 1984

    Should be good for all film, all paper. The paper curve is steeper than the film curve.
  33. Re: Calibrating a Zone VI compensating developer timer

    Even without tests the standard calibration should match. I think film is calibrated to Tri-X. So your results should match the time/temperature chart for Tri-X
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    Re: OLD film OLD paper Solutions

    Nice.

    I think it depends on the storage. I have some that does and some that doesn't
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    Re: OLD film OLD paper Solutions

    Kodabromide postcard paper seems to have no fog.
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    Re: OLD film OLD paper Solutions

    I was being silly. But I do know some people who will happily accept old paper and then fix, wash, dry and then re-coat and use it.

    I have been fighting with old film (I know it's self-inflicted...
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    Re: OLD film OLD paper Solutions

    If you fix the paper first it won't fog
  38. Re: Needed : TIME-O-LITE user's manual with the MONITOR model

    Same thing. Two words for the same thing. But it’s different than the ones you might be used to seeing. instead of a wiper moving in a circle on a disc of carbon... the monitor is high power and...
  39. Re: Boosting contrast with extended development, your choice of film.

    This is 35mm but I am sure the TMAX-100 sheet film behaves the same way. Your straight line section is so clean at every contrast level, that you just need to expose enough to get up on the line,...
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    Re: Kodak Kodabromide G2 VS F2

    I found myself with a box of F3 and F4 Single Weight. One has too much fog, the other is more usable. I assume because one had poor storage.
    If you are shopping around, then look for signs of good...
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