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  1. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    Received in ny.
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    Re: Lens Aperture vs Meter Reading

    In accordance with Seconic manual the decimal scale displays in 1/10th of a stop. Not time, not aperture, just a stop. So when Seconic measure 5.6 & 5/10 or 4/10 it will be yours 6.8 aperture....
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    Re: Need Help With a Repair of my Ebony

    The problem may be caused not by the gear rack itself, but the wood. The thing is that the ebony wood from what the camera made happens to be very sensitive to the humid. I'm using Ebony about 7th...
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    Re: Quarantine Pictures Any Format

    That's the amplifier!!!!!!
  5. Re: Where does one get custom ground glass from these days?

    When I contacted Steve a few years ago, I also wait for respond more than a few days. But finaly he did respond and made the glass in a few days.
  6. Re: Where does one get custom ground glass from these days?

    https://hopfglass.wordpress.com/

    Steve Hopf - maker of borosilicate ground glass.
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    Re: Darkroom Ventilation advice, please

    In accordance with ASHRAE, the darkrooms required 20-30 cfm of fresh air per person. To have 1 air change per 3 min. giving you 20 air changes per hr. This is craaazy big number and really...
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    Re: Dual Focusing Mechanism

    I never see that mechanizm. But if it is a planetary reduser, than it will allow to turn a I high speed wheel when the outer low speed wheel hold unmoved. The speed ot rotation will change, but it...
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    Re: arca swiss movimientos

    I never used Arca, but why you cant measure it. Take a rule or tape and measure the bellows extension. You do it one time and will know forever. And second if both standards having the same...
  10. Thread: ROLL CALL

    by R.K
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    Re: ROLL CALL

    Every day
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    Re: "Trimming" a Bill Maxwell screen to size

    If it is plastic, then its probably soft enough to trim it with woodworking hand plane. Of course you need a sharp plane or better a block plane and some understanding in the woodworking, or at list...
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    Re: Thinking about getting into 4x4 filters

    With many today holders, polarizer can be rotated with out rotating the holder itself. The problem is that exept Lee, nobody making hoods for their filter holders.
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    Re: Thinking about getting into 4x4 filters

    All holders for rectangular filters basically the same and main purpose of them to hold the filters. Today most of the holders can hold a polarizer and a 2 or 3 filters. If you getting that...
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    Re: Use of X-ray film: technical discussion with example images

    That's what I wright Randy. Film in the tray with emulsion up. Unfortunately the Google translated it in absolutely opposite way.
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    Re: Use of X-ray film: technical discussion with example images

    Сергей, я не специалист в рентгене, я только перевожу. Все склоняются к мнению ,что у вас неравномерное проявление. Во первых я бы убрал стекло из кюветы. Фильм достаточно прочная вещь и он не...
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    Re: Sekonic L758 Spot Meter Question

    [QUOTE=IanBarber;1445874]Bob, how do you change between camera presets[/QUO

    To change between cameras press and hold "ISO1" button and after press "Mid Tone" button. One press on the mid tone...
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    Re: Sekonic L758 Spot Meter Question

    You right, the best pictures was made without a light meter in many cases.
    But I’m certainly not that good and I’m using Sekonic. Before I used the spot with mechanical calculator and get used to it...
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    Re: Sekonic L758 Spot Meter Question

    So in most of the situations you don't nead an average value. Am I right?
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    Re: Sekonic L758 Spot Meter Question

    Let say you light and shadow readings 10 EV apart. So what will you search for in the scene after pressing the average button?
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    Re: Sekonic L758 Spot Meter Question

    Let say you have two readings. One for higlites and another for shadows, and those readings a 4 stops appart. In that case if you use average it will be exact in the middle betwin your readings. If...
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    Re: Sekonic L758 Spot Meter Question

    No. In yours exemple you having an ideal situation. You already know what you want to be a middle gray value and it is the first measurement. The second and third measurements confirm that the...
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    Re: omega lens cones produce reflection

    I have Omega enlarger and I never had problems with lens cone. But mine cones are black inside. Are you cone black? ore maybe you have some chromium plated lens mounting ring.
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    Re: Need some help with my Nikkor steel 4x5 tank

    The name of the Chinese tank manufacturer bw-king. He is a member of this forum and he is the only seller of his tank. You can contact him if interested. In my opinion the Chinese tank better made...
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    Re: schneider super-symmar xl 150mm filter question

    The simplest solution probably is to obtain any type of not expensive, broken, scratched, or used old filter with 95 mm tread ( you need just one), remove the glass and use metal part as an extension...
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    Re: DIY darkroom tent - bad idea?

    Stain used darkroom made from black plastic like for years.
  26. Re: 4x5: If I don't have a macro type lens, what's the next alternative?

    Plus diopter lenses can be used for macro with any large format lenses successfully and they are not expensive at B&H.
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    Re: Sekonic L758 Light Meter Question

    In the aperture priority mode the EV scale displayed on the bottom, and it divided in 1/2 and 1/3 of the stop. It is just necessary to get used to it. I always measure highlights first, and save it...
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    Re: Steve Hopf Ground Glass

    Sometimes he respond not right away. Be patient.
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    Re: Sekonic L758 Light Meter Question

    So, what the problem. F16 7/10 almost the same as F16 2/3. Many shutters having 1/3 scale.
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    Re: Film Development Testing Question

    To avoid this, before pulling dark slide with hole out, slide in some sheet of film between the dark slide and the holder and after pull dark slide together with that film out. And don't worry this...
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    Re: Can you identify this Toyo-View model?

    You welcome. Short rail can be used as an extension for example when you need a long draw for close up's, or it can be used separately, when you working only with the wide angle lenses, it is more...
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    Re: Can you identify this Toyo-View model?

    No parts any more from Toyo, but the lens boards and bellows can be interchanged with the new currently in production. But the new ones expensive. Better to get some old o broken camera on EBAY if...
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    Re: Can you identify this Toyo-View model?

    Long time discontinued.
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    Re: Can you identify this Toyo-View model?

    Toyo 45S.
  35. Thread: Home-made aperture

    by R.K
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    3,111

    Re: Home-made aperture

    Some old fashion drafting tools sets used to include a measuring calipers with micrometer screw. They looks same as the calipers to draw a small circles but instead of one head to be with sharp...
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    Re: Remove hardware from wood

    I don't think the drilling is the best choice. A 100% you will be of the center and finally will damage the wood. If I would do it, I would use only a hand file and file the rivet head off. This will...
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    Re: LF 4x5 - What to buy?

    Large format photography much different from Digital SLR. Before you start collecting staff and equipment get some understanding about the field of photography you are going to enter. Look for some...
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    Re: Harman Direct Positive Images

    Yes I did. Nice uniform preflash. Also can be used in Zone system film testing.
  39. Thread: Tripod & Carry-On

    by R.K
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    Re: Tripod & Carry-On

    Tripods to carry on no problem. I just did it last Saturday from NY city to Costa Rica. I had a backpack with camera and tripod in the separate tripod carry bag.
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    Re: 2016 Ground glass sources

    Steve Hopf
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