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  1. Re: studio space problems with soft boxes

    Beauty dishes are slightly more compact, if that helps. Or maybe just bounce the strobe off the wall? Not the same, but closer to a softbox than LED strips.
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    Re: Wet plate focus confusion.

    Collodion is relatively close to the visible range, from well into the visible blue to the near-visible-UV. Camera lenses made after around 1850, including Petzvals, were pretty well corrected for...
  3. Re: Lensboards for Macro Stereo :confused::confused::confused:

    I don't think so. The movement needed for a close-range subject would be angling each lens inward so that each points directly towards the subject.
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    Re: Wet plate focus confusion.

    The amount it is off by will vary with different focusing distances.
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    Re: Compare Wet Plate to Best LF Film

    I may be wrong but I think Daguerreotypes are the highest resolving process.

    Should have quit while we were ahead...
  6. Re: New Photoshop ‘Select Subject’ Feature Gets Even Better

    A few nights ago, I was watching a show about Caligula's Rome on PBS.

    About 40 minutes in, I realized, "Oh, wait... this is the News Hour".
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    Re: Compare Wet Plate to Best LF Film

    Wet plate still clumps into grain, but grain is generally proportionate to speed, so yeah, it's small. But looking for grain on a tintype is like looking for grain in a contact print. Gonna need a...
  8. Re: DIY traction improvers for Bogen 3221 tripod

    Most Bogens I've seen have leg-spread limiters at the top of the legs adjustable to two or three angles. You can also put restricting cords or light chains lower on the legs to keep them from...
  9. Re: New HC110 Liquid Same as Old HC110 Syrup?

    The bright yellow eventually goes to the dark brown, but still works as well as it did when it was new. Also as well as the old dark brown stuff did when it was new. And the old dark brown stuff...
  10. Re: New HC110 Liquid Same as Old HC110 Syrup?

    Just as background info, the old HC110 was glycol-based, not water-based. Glycol will not give up oxygen to degrade the chemistry. Water will. I don't know what the current HC110 uses as a base.
  11. Re: Fungus on antique Lens: Can it be fixed?

    If it's in the cemented surface, it's really hard to differentiate between the various forms of fungus damage and the various forms of cement failure. Even if you repair it, you may never know for...
  12. Re: New Photoshop ‘Select Subject’ Feature Gets Even Better

    Sometimes I think I should drink less.

    Then I watch the news and suddenly I think I should drink more...
  13. Re: New Photoshop ‘Select Subject’ Feature Gets Even Better

    I'm just being a grump. I tried cloning over my grumpiness with the clone stamp, and fixing it with the healing tool, but I can't seem to save it...
  14. Re: New Photoshop ‘Select Subject’ Feature Gets Even Better

    I think the forum should ban discussions of Photoshop, the same way it banned discussions of politics and religion...

    It just feels... icky.
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    Re: How to get into ULF?

    "Re: How to get into ULF? "

    Just take the back off and crawl in!

    :p :p :p

    Seriously, you folks should talk to the moderators about banning me from the forum...
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    Re: June Portraits

    I do. But you never know when you might need two.

    Or three...

    Or four...
  17. Re: Lensboards for Macro Stereo :confused::confused::confused:

    That would, of course, require two separate exposures, hence, as you said, still life only. I'm being picky about using a conventional stereo camera, an admittedly arbitrary restriction on my part.
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    Re: June Portraits

    Told ya so! Beautiful work! Watching with interest...

    I think I want it back. :( :( :(
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    Re: Focusing A Petzval

    Historical trivia: at the same time Petzval was designing the Petzval Portrait Lens, he also designed the Petzval View Lens. It had a fairly flat field, covered a wider angle, and was fairly sharp...
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    Re: Focusing A Petzval

    It's called "learning". Don't you just hate it? :)
  21. Re: Lensboards for Macro Stereo :confused::confused::confused:

    Shifting the plate position instead of the lenses? Now that's a solution I hadn't thought of! Thank you, Chauncey!
  22. Re: Lensboards for Macro Stereo :confused::confused::confused:

    Thank you, pgk! From the sliding-in-the-slot mount to the camera you linked to, it appears the spacing can be altered, but not the angles. Perhaps you're right that it was done with single lenses...
  23. Lensboards for Macro Stereo :confused::confused::confused:

    Let's say you want to do stereo at near-macro distances. You'd need to angle the optical axis for each lens inward a little bit so they both pointed at the main subject. Was this done historically?...
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    Re: Wet Plate - A Beginner's Experience

    Also, I keep my silver in the tank, though I wouldn't on a tank larger than 11x14 or so if it had glued seams. Too much constant pressure from the larger amount of liquid over time. But you'll want...
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    Re: Wet Plate - A Beginner's Experience

    On filtering the silver bath, I filter mine "as needed", when the floaties build up. I have a red LED cluster on a swinging-arm lamp fixture I point directly into the silver bath. As I raise the...
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    Re: Wet Plate - A Beginner's Experience

    I can clearly see the markings on the back dark slide through the ground glass after I put it in the camera, so it's completely foolproof. With my system, only a complete idiot would put the plate...
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    Re: Wet Plate - A Beginner's Experience

    I use a silver-plated stainless steel wire from the Michael's craft store with no issues. I put a thick drop of epoxy on each one and run it to the edge of the opening. The rounded bump helps guide...
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    Re: Wet Plate - A Beginner's Experience

    Also, don't put collodion in plastic containers. The collodion seeps in and bonds with it. But it's not an issue with acrylic silver tanks, dippers, developing trays, etc. as the collodion sets up...
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    Re: Wet Plate - A Beginner's Experience

    Historically, leaving a plate in overnight is the accepted method. At worst, it's harmless. I've noticed well-used silver baths behave nicer than brand new ones.

    BTW, I've used a number of...
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    Re: Wet Plate - A Beginner's Experience

    When you "season" the silver bath by letting a coated plate sit in it overnight, use a glass plate, not an aluminum plate. Silver nitrate will crystalize out on the aluminum and you'll be exhausting...
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    Re: June Portraits

    My rule of thumb is keep the whole face in the area of sharp focus. That area is usually fairly good size, but as the face is often just a little high, just a little movement might help. But I'm...
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    Re: Grunlach Hyperion, difference between

    I would guess almost certainly yes, all the 36" elements are the same, as symmetry solves a lot of design issues. And all the single cells were 2-elements designed to work alone or in combinations. ...
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    Re: Grunlach Hyperion, difference between

    On the No. 5, it's a triple convertible, a 20" and a 36" that combine to give a 14", The No. 7 is a double convertible, with two 36" elements that combine to give 18". They could have also offered...
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    Re: June Portraits

    Beautiful, haunting image, Ari! Vesta found a good home. :)



    Remember, you have front rise/fall on the 2D to move the sharp center up and down a little, but watch for vignetting!
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    Re: Focal Length Confusionism

    ...if you can get it to do the backstroke, you've really got something!

    Yeah...
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    Re: Focal Length Confusionism

    When you change the location of the flange, all you're changing is the location of the flange. You're not changing the focal length, or the location of the nodes, or any other optical...
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    Re: Focal Length Confusionism

    The flange location is an arbitrarily-placed measuring point. If you removed the 300mm Sironar S from the shutter and put it in a properly spaced barrel with the flange at the very rear instead of...
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    Re: Focal Length Confusionism

    How in the heck does where the manufacturer places the mounting flange on the outside of a lens change where the rear node is inside the lens? It's completely independent of the optics.
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    Re: Focal Length Confusionism

    I don't see how that can be accurate. Location of the flange is completely arbitrary, wherever the shutter or lens barrel manufacturer decides to put it. It's a mounting decision, not part of any...
  40. Re: Taylor-Hobson Cooke Series II Portrait Anastigmat 12.75" F/4.5 lens query

    Agreed. A little too much penetrating lubricant can fog a lens inside the barrel, necessitating disassembling and cleaning.
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