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  1. Replies
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    Re: What is anti-Newton ring glass exactly

    Yes... I propose testing on real RA-4 paper, printing on it an IT8 target
  2. Re: Head and Shoulder Portrait Lens for 11x14 Camera

    Yousuf Karsh made most of his 8x10 portraiture with a 360mm, the Commercial Ektar 14".

    ___

    A cheap and nice ULF choice found in shutter is a Symmar 360mm convertible to 620mm f/12, you would...
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    Re: What is anti-Newton ring glass exactly

    I've calculated, with the lux meter, that with the 138 with condensers a 150W LED a 2m print can be exposed in under 40S at f/11, avoiding paper LIRF and needing less a G type lens that's required if...
  4. Re: Head and Shoulder Portrait Lens for 11x14 Camera

    I like the portrait's depth, impressive... big format is big format...
  5. Re: Head and Shoulder Portrait Lens for 11x14 Camera

    1890, not 1980 :)
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    Re: Drum Scanning recommendation

    First, take a x40 magnifier and inspect the finest detail in the negative, then equally enlarge the V800 scan (4000dpi) in the monitor and see if something is lost.

    Second, many 8x10" drum...
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    Re: What is anti-Newton ring glass exactly

    the 138... it is condenser, it is diffuser and it is everything in between. You may use this: a "LAPAL ground-glass diffusing screen can be inserted into the filter-holder", or other frosting...
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    Re: Keeping Time tray developing film

    Also youtube has many videos with countdowns https://www.youtube.com/watch?v=HhmnroMjjHs

    Audio can be downloaded and played in the smartphone.
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    Re: Keeping Time tray developing film

    Open lights...


    Use a paper safe as your tray, or place your tray inside a paper safe or another light tight box, in that way your tray is a "daylight tank". When development done... close...
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    Re: First year Heliar's

    Heliar was patented in 1900, I guess the lens would not be sold before 1900. In 1902 another patent was filed with improvements:

    "According to Rudolph Kingslake's "History of the Photographic...
  11. Re: First Forey Into 8x10 Format/ Intrepid 8x10 Camera

    Yousuf Karsh used one, he made the US presidential photographs from Eisenhower to Bush father, so it was the "Camera ONE" in fact :)


    Today C. Burkett uses one: Min 4:12 >> ...
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    Re: What is anti-Newton ring glass exactly

    Also condenser type enlargers are much more efficient and they use only a fraction of the power than a diffusion head. The 138 with a LED lamp has a low reheating in the film. With the tungsten lamp...
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    Re: What is anti-Newton ring glass exactly

    No taping, the mask had the same size than the glass and it was retained with the same clips than the glass
  14. Replies
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    Re: What is anti-Newton ring glass exactly

    Drew, the format reducing mask can be placed over the top glass, with no harmful effect.

    The 138 I use came with a 24x36mm cartoon black mask placed over the top glass...
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    Re: What is anti-Newton ring glass exactly

    You are right, just I checked it and with the 1951 slide with the engravings up, and on it: the durst AN glass with the frosted side down. Inspected with a 200x hand microscope it resolves well group...
  16. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    An advantage of the V850 is that it makes a very good dusting automaticly, taking advantage of the infrared channel (with color film) (ICE , iSRD) making a perfect job, and saving a costly...
  17. Re: Linhof Technika 4x5 parts... Need 2 screws... Hard to get!

    Until you don't find a suitable/original replacement you may use a fully threaded bolt with a metal/plastic tube/sleeve to simulate the "shoulder" of the bolt.

    Or search "Shoulder Bolts" in...
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    Re: What is anti-Newton ring glass exactly

    I would not use the ANR glass in the NEGA 138 for the bottom glass, it would be interesting to check what happens, I'll do it... I'll place an USAF 1951 grass slide on in and I'll project on the...
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    Re: What is anti-Newton ring glass exactly

    AN glass can be used in glass carriers for the top glass, the negative is sandwiched between two glasses... the bottom glass it has to be clear glass because if not the image would be blurred, but...
  20. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Mark, sorry, until now I could not download and see the shot of the usaf 1951 chart.

    With a printed chart you have to place it at some 3m, for a test in macro conditions you should use a high...
  21. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Law of diminishing returns.

    As you only take 30Mpix effective from the medium it has little importance if you shot 8x10" or MF, regarding on print IQ.

    Try it...
  22. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    OK, no objection, but as you only require that IQ level then you may save film by using a MF film back in your view camera, cost will be 1/8 and you will have the same print.

    When I spend a velvia...
  23. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    +1
  24. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Regarding drums, here there is an accurate evaluation, see table
    https://www.onlandscape.co.uk/2011/12/big-camera-comparison/

    197304

    That test was performed by Tim Parkin, Joe Cornish, Dav...
  25. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Your DSLR, single shot with p shift, will take some 30MPix effective from a 4x5, a V850 will take some 140, a 4000dpi drum scan will take some 200MPix effective and a 8000dpi one will take some real...
  26. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Scan, single shot, with the DSLR, and you learn what pixel shift does or not does. You won't find more than effective 30MPix effective.
  27. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Speardynamite scans a 8x10" with a single DSLR shot, so a medium able to record (say) 700 effective MPix is scanned into a file that has many repeated pixels but only around 25 to 30 effective MPix....
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    Re: Best enlarging lenses

    IMHO it is pretty standard for amateur usage to overcome enlarger's limitations, and it's also suitable for small prints, and for crops. It's fall-off may also compensate the taking lens fall-off. ...
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    Re: Starting with ULF

    The simplest solution is using tray development, this 11x14" paper safe was sold for $18:

    197239

    Place emulsion up, you make the development with lights open, then close lights and move the...
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    Re: Best enlarging lenses

    Yes... but these are not LF lenses. The 135 may see some usage, for 4x5", to compensate fall-off or to overcome enlarger limitations, even shorter focals may be suitable for enlarging a crop, but...
  31. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    +1
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    Re: Starting with ULF

    https://www.angusparkerphoto.com/blog/2015/2/ulf-lens-recommendations-14x17
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    Re: PQ Universal for HP5+ and/or Pan F+

    Sandy, you are right, N is an ample concept, I guess that with silver gelatin paper it is the development that produces an easy to print negative for grade 2 Paper, for Normal SBR scenes, ...but each...
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    Re: PQ Universal for HP5+ and/or Pan F+

    You have to check it, equivalent times may not be linear. Ideally you should make a film calibration like it is explained in Beyond The Zone System Book, but there are simple practical procedures.
    ...
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    Re: PQ Universal for HP5+ and/or Pan F+

    I guess that I understand it... with Pyro (as stain blocks more UV than visible) you would require less density, but with silver negatives an energic developer like PQ it is useful to reach such...
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    Re: PQ Universal for HP5+ and/or Pan F+

    Jim, yes...

    I guess that the right answer to OP is 1:19 / 4min for Normal contrast, but 1:9 if he wants higher than normal contrast.

    It's nice to see that Vaughn is using PQ to make...
  37. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    CAMERA
    |
    |
    |
    |
    ANTI-NEWTON RING GLASS (with black masking on top?)
    NEGATIVE
    ANTI-NEWTON RING GLASS
    LIGHTBOX
  38. Replies
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    Re: PQ Universal for HP5+ and/or Pan F+

    Vaughn 0.62 should be normal contrast, 0.8/1.3 = 0.62 aproximated, GBar IIRC is "Average Gradient", so Contrast Index averaged in the considered exposure interval.

    197201

    So for a N...
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    Re: PQ Universal for HP5+ and/or Pan F+

    Vaughn, this should be 1:19 , I guess

    https://www.digitaltruth.com/devchart.php?Film=&Developer=%25PQ+Universal%25&mdc=Search&TempUnits=C&TimeUnits=D


    I used it for reversal processing to...
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    Re: Anyone use rainwater in the darkroom?

    Iron content in water is cited as a factor that decreases shelf life of Kodak Xtol, as Ascorbic is sensible for metall ions then iron may cause Xtol's sudden death.
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