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  1. 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...
  4. 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...
  5. 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...
  6. 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...
  7. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    +1
  8. 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...
  9. 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...
  10. 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.
  11. 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...
  15. 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...
  21. 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
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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.
  25. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Interneg, Interneg.... I guess that you ignore that diffraction limit at f/11 is 141 "Line Pairs per mm" , it is a good aperture to start with, because it is a good balance to increase DOF and...
  26. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    A 80mm Rodagon would be perfect, imagine that the thread is M39, you would use this $9 ring:...
  27. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    1) Buy a used enlarger lens, it's way cheaper than a Sigma ART and it will outperform the Sigma as it is designed to have an optimal flat field for close work.

    2) Pixel shift won't improve much,...
  28. Re: Paper similar to Hahnemühle Photo Rag

    We are privileged to have her
  29. Re: Paper similar to Hahnemühle Photo Rag

    Nano, please see The Light Farm books, by Denise Ross

    Also you may see in youtube a video by Ron Mowrey, hand coating paper.

    You may buy VC emulsion, so you even have Variable Contrast
  30. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    :) :) :) Somebody had to say that your "recommended method" only takes 7% of the graphic information that's in a 8x10" sheet.

    Scan and print like you want... it's your problem :)
  31. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Yes, you may require around 50 Mpix effective for that, so your method is OK, it falls a bit short but it won't be much noticeable.

    Anyway a 810 sheet may have some +500MPix inside, so if you...
  32. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Because grain/clouds are different, and some deliver more aliasing, generating more noise in certain scanners.
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    Re: Ventilation specs for darkroom

    Beyond norms, the key is not to have turbulence. Air has to flow laminar from the emision sources to the extraction, in that way fumes are never breathed. If we have turbulence we always breath some...
  34. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Yes, there is no doubt that Epson is absolutely proficient in color management, they imposed a dictatorship in the inkjet Pro printing and this was not by chance.

    Anyway today we have powerful...
  35. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Of course, but you require the holder https://www.bhphotovideo.com/c/product/276369-REG/Hasselblad_50200412_6x17_Flextight_Original_Holder.html

    197027

    V850 can also do it.




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

    The Hasselblad Flextight X1 provides a speed of 60 MB / min. So it depends on how you scan, IIRC 5 to 10 4x5" sheets per hour, perhaps some $5 per sheet if you are efficient.

    So you may hire the...
  37. Re: How different are Tessars from different companies?

    Not only for tessars!!
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    Re: Ventilation specs for darkroom

    https://www.largeformatphotography.info/forum/showthread.php?153539-Darkroom-Ventilation-advice-please&p=1511600&viewfull=1#post1511600
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    Re: Pin registration system preferences

    I don't see the problem, you may see in many videos how glass is smoothly perforated and smoothly cut: https://www.youtube.com/watch?v=a_qMKKwvzz8 , but if they cant... no problem, if the pin is...
  40. Re: Should I Drum Scan, X1 Flextight Scan, or use the Epson V850 w/Aztek Wet Mount Ki

    Of course one may not want a 44" sharp print, at the end such a print is viewed from 1m far, and if the viewer does not put his nose on the print he won't see that it's a low quality enlargement. :)...
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