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  1. Replies
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    Re: Massive Negative Reduction with Enlarger

    Enlarging paper does not have enough resolution to require anything other than one's standard enlarging lens. The magnification ratio for a reduction is nothing different than any other enlargement...
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    Re: Massive Negative Reduction with Enlarger

    If you want to make a 4x5 print from 5x7 negative, one way to get the measurements is to print a 4x5 negative to 5x7. Your lens focal length, enlarger head position, and baseboard will stay the same....
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    Re: Massive Negative Reduction with Enlarger

    There is no magnification on a digital image (all posted images are digital).

    When making the prints, heed the minimum subject to film distance to focus, which is 4 x the focal length. Don't setup...
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    Re: Flat Field Focus on LF Lenses?

    You realize that you will also need a ruler to perfectly position your eye from the print for it to be that exact.

    I focus at infinity because the prints look better to me that way. Otherwise you...
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    Re: Is There a Plan for Future

    I thought it was the Mods and the Rockers. Not heard of the Patrons.
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  6. Re: Best way to ensure appropriate DoF in interior shots?

    Exactly that!

    I focus the near point and glance a the knob marker and note the "time."
    Then I focus at the far point and check the knob and note the "time."
    It is pretty easy to determine how...
  7. Re: Best way to ensure appropriate DoF in interior shots?

    My 8x10 camera focuses with a knob. I have an indicator on the knob so I know, for example, "12 Hours" (half turn) = F32, etc.
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    Re: durst power supply EST 1000N

    Forums change with time, so I thought maybe it might work this time. For example APUG did not allow direct image upload, but after becoming PhotoTrio, you can upload images.

    I did get an email...
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    Re: durst power supply EST 1000N

    This is why:

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    Also:

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    See the thread in post #30 above. I guess I could have started a similar thread on this forum.
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    Re: Electronic circuit in D5 lens turret

    At first I thought it might be the shutter for the Omegalight, but I did find a picture and it is certainly different. Again, making it appear you have a unique device.
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    Re: How to handle "Free on Loan" threads, etc.

    Certainly there are valuable and expensive items I'd not loan. However, the current state of selling on ebay shifts the benefit ratio far from any benefit to me for selling anything less than $500....
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    Re: durst power supply EST 1000N

    I got a couple of email requests for that recently. People's email and user names almost never match, so I wasn't sure if I sent it to you already. PM me with you email and I'll send it.
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    Re: durst power supply EST 1000N

    Trying: https://www.photrio.com/forum/threads/open-letter-to-sean-hosting-darkroom-equipment-pdf-files.180788/
  14. Re: How do you see and appreciate a large format Portrait?

    I don't follow portraiture, I think the 20x24 Polaroid stuff is all I can recall off hand seeing in person. On the internet, everything looks to be digitally manipulated so I usually think 'what is...
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    Re: Decoding Jobo Gear.

    May help:

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  16. Re: Added H&D curves to my Film Log webapp, though I'd share

    There are some proponents of Delta-X method, but my friendly challenge to see a spreadsheet make the ark as one would do with a compass and find the intersecting point has drawn a blank.
    BTW I have...
  17. Re: How to make a sports viewfinder or wire viewfinder?

    Just looking at your numbers without the exact calculation, it appears you horizontal angle of view is just a little wider than some normal lens, so a viewfinder for a 35mm lens on a 35mm camera...
  18. Re: Added H&D curves to my Film Log webapp, though I'd share

    The reasearch by Loyd and Jones showed the best correlation between print quality and speed was with a speed point at a tangent of the toe at one-third the gamma (0.3G) line.
    This is hard to get...
  19. Re: Added H&D curves to my Film Log webapp, though I'd share

    I have been using the first 10 or 11 steps after 0.1 as my personal "Contrast Index" in all my computations ( a linear regression of those points, exactly). I started using a spreadsheet to do this...
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    Re: Too good to be true?

    People have been putting iDevices in enlargers for years. I'm not sure this is better to us a camera in stead of an enlarger. I may be missing something of what the device does. Either way, where...
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    Re: 20х24" enlarger

    Rolleiflex Hy6 I just got will do that. It is called "Focus Trap" and it can be used with a non-autofocus lens or an autofocus lens set on manual. It monitors focus and when the subject comes into...
  22. Re: X-Rite's Patented Sensitometer Electroluminescent Light Panel

    I found both devices easy to make process control strips. I do remove the attached step wedge for each device and measure the steps on my own densitometer. They are not exactly spaced at 0.15logD....
  23. Re: X-Rite's Patented Sensitometer Electroluminescent Light Panel

    Competitor ESECO uses a series of LED lamps with diffusion material:

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  24. Re: X-Rite's Patented Sensitometer Electroluminescent Light Panel

    This is what the panel looks like when the diffuser and step wedge are removed.
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  25. X-Rite's Patented Sensitometer Electroluminescent Light Panel

    Flat panel provides very even illumination in a compact device. Very different from the other sensitometers produced.

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  26. Re: Notes on Fomapan 100 development with various developers

    Seems about right for that film.

    I got results somewhat similar from 8x10 Shanghai film.
    ...
  27. Re: the thread for Kodak XTOL quality control issues

    "objective process" is 98% of this forum :D, why leave development chemistry to chance? I bet Drew doesn't...
  28. Re: the thread for Kodak XTOL quality control issues

    No one does any process control or has objective data to show on this issue?

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  29. Re: How to avoid splotches on edges of negatives from drying

    Not sure what I'm seeing when I download the Jpg. Comes up as a transparency. If it indeed is a negative, the only excess density that might come from water impurity would be the tiny spec in the...
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    Re: Wet plate on Astronomy Picture of the Day

    Not sure I understand. Even in one second the moon is pretty blurred. How would that image be made with an 8x10 camera?
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    Re: Which are the fancy lenses??

    Super Wide
    Telephoto
    Soft Focus
    Compact
    Extra Long Non-Tele (ULF)

    Those are the ones I can think of off hand.
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    Re: Suggestions For Wide Angle Lens on 8x10

    210mm is nice as 190 might be too close to your 150mm and 250mm might be too close to your 300mm.
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    Re: What size 8x10 lens to match..

    Maybe somewhere around 150mm. No exact answer because the formats are different aspect ratios.
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    Re: Cannot Over Expose?

    My ad blocker is detected by YT and won't let me see certain videos, so I was saved from having to see or hear the video link in the original post.

    I'd be pretty comfortable thinking every...
  35. Re: 360mm Gerogon Enlarging lense? Opinions Please

    I don't know that lens, but if the glass surfaces are cleaner than your 360 Componon, maybe better.

    I don't know if it just me, but I have six COMPONON lenses in SILVER barrels and all of them...
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    Re: Self Portrait Tools

    When I first saw the Nixon girls photographs, I started taking one self-potriat each year. Didn't have LF 35 years ago, so the negative has always been 6x6cm. Looking back at the prints, first 20...
  37. Re: Daydark Street Postcard/Tintype Camera Repair, Safelight Filter Replacement

    I'd think the Rosco RED would work. I put this on the lights of my enlarger. It is pretty inexpensive to just buy a roll and try it.

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    Re: Do you keep a checklist?

    Camera, focus cloth, Lens & caps, release. Nothing else in the bag. Film holders in a separate bag and meter in my pocket or around the neck. Add in a tripod, car keys and wallet and I'm at my weight...
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    Re: Correcting Focus When Stacking Filters

    Maybe more time under the dark cloth to adjust your eyes.
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    Re: Correcting Focus When Stacking Filters

    Try focusing with the filters in place.
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