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    Re: Recycling Silver Gelatin Paper

    The short answer is no.

    The long answer is that the point of recycling is to create a new paper base that can be used to make more products. Mixing all kinds of papers together into a batch makes...
  2. Re: Has there ever been a retrofocus wide that covers 4x5/9x12 or larger?

    I don't -- what are the reasons I'm not supposed to want one? I've always thought they would be a pretty good idea. Especially when you get down to, say, 80mm or less on 5x4. About the point were you...
  3. Re: Natural North Light Traditional Lighting Wet Plate

    Not really, because real sunlight at the surface of the planet is a variable. It literally varies from minute to minute, day to day, and season to season. It's different from cloudy to clear, all...
  4. Re: I take back every bad word I have said about Kodak...

    I've said for years that TMY2 is the best film ever made. Period. And it is well worth its price.

    But my saying it means exactly zilch to anyone who hasn't personally experienced it. Now that you...
  5. Re: Getting ready for bw development which developer?

    Yup. This. Exactly this.
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    Re: Darkroom Ventilation advice, please

    Air is compressible. As such it's much easier to pull air than to push it. Air pushes about as well as pushing a rope. Much better to put the fan on the wall exhausting to the outside. Much better to...
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    Re: Strange Dark line in Negative

    Are the artifacts (the black lines) the same on various negatives, or just similar?

    It's unlikely this was caused by something between the scene and the film at exposure time. That is, it's not...
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    Re: No One Making New Lenses?

    A swing and a hit. Going, going... it's out a here! You won't get a better or more concise explanation that Mr. Galli's.
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    Re: spherical aberration solved?

    This is the difference between science and engineering. Science is about figuring it out, engineering is about using it to build things. The scientists in this case have figured out how to solve...
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    Re: spherical aberration solved?

    Not with a singlet -- a single piece of glass. It always took at least two, which is perhaps why lenses of the period used so many cemented doublets and triplets.

    What makes this interesting to me...
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    spherical aberration solved?

    Looks like the 2000 year old question of how to eliminate spherical aberration in camera lenses might actually be solved.

    Some of you are good at lens math. What say you?


    Looks like this is...
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    Re: Fastest film for 8x10 other than TMY

    I get an EI of 500 with TMY-2 also, in XTOL. Just sayin'.

    About the best you can do in 10x8 is going to be HP5+, but HP5+ shoulders off where TMY-2 keeps going, and HP5+ is going to go into...
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    Re: Amber Plexiglas for Wet Plate Dork Box?

    It fits me at least. And I'll bet a surprising number of us will admit to that also.
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    Re: Amber Plexiglas for Wet Plate Dork Box?

    Thread: Amber Plexiglas for Wet Plate Dork Box?

    Dork Box? ROFLMAO! I haven't laughed that hard in ages. Thanks.

    And sorry I can't help with your dark box problem. I'm just a photo dork, what...
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    Re: AC, Venting, ideas for a Darkroom Shed?

    :cool:
  16. Re: Need help troubleshooting scanned negative IQ

    What? Did you think you could get good at scanning without doing the work and making mistakes? Hehehe.

    The more mistakes you make, the better you get.

    If it makes you feel better, I've got...
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    Re: AC, Venting, ideas for a Darkroom Shed?

    Air is compressible. You can pull it, but you can't push it effectively. If you try to push air down a duct with a turn in it, what usually happens at the turn is a drop in airflow. Because what the...
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    Re: AC, Venting, ideas for a Darkroom Shed?

    It it were me I'd be looking at a ductless mini-split system for HVAC.

    As to ventilation fans, always remember that fans like to pull, and they hate to push. Said another way, trying to blow air...
  19. Thread: Why Crop?

    by Bruce Watson
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    Re: Why Crop?

    Short answer: Because I want to.

    Longer answer: I don't tend to see many compositions in the 5:4 ratio. I mostly see more rectangular images. Perhaps my favorite ratio is the Golden Ratio 1:1.618....
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    Re: Retain highlights with Tmax 100

    I'll take your word for it. I just remember reading in one of the Kodak Tech Pubs back in the mid 1980s (?) when TMax first arrived that it would stay linear past 20 stops. But I was still a "Tri-X...
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    Re: Retain highlights with Tmax 100

    Except that it doesn't. The exposure anchors the shadow end of the contrast curve. Development anchors the highlight end of the contrast curve, and therefore determines the slope of the curve....
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    Re: Margaret Bourke-White

    Oh. My. Dog. Really?

    I knew about Ms. Bourke-White and her extraordinary photography well before I ever picked up an LF camera. She's one of my photography and LF heroes. Perhaps the best eye for...
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    Re: Retain highlights with Tmax 100

    Retaining highlights? IIRC, TMX is linear out more than 20 stops. This could result in highlights so dense that it can only be seen in the laboratory. But it's there -- all that image information is...
  24. Re: How Large Can I Print a 4x5 Drum-Scanned Negative Before The Resolution Degrades?

    Let's start from the opposite end of the question, shall we? Assuming you make a print that big, how will you frame it? How will you transport it? These are not trivial questions. A 6x8 foot print...
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    Re: Dark shade on negative

    Because you didn't cover the entire film with developer at the same time. For example, you were tray processing and put the film into the developer emulsion side up and didn't get that last bit on...
  26. Re: Develop for sharpness and fine grain with FP4+

    There are acutance developers (sharpness) and solvent developers (small grain). Trying to optimize both sharpness and fine grain at the same time is... difficult. Perhaps the "easy" way if there is...
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    Re: Developing for shadows

    The reason you can "develop for the highlights" is that in normal use, the highlights (most dense) do not, in fact, develop to completion. Which is why we often use stop baths -- to force development...
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    Re: Developing for shadows

    You can't really develop for the shadows. That's due to latent image -- either you have one, or you don't. If you didn't expose enough to form a latent image, you can develop for days and still end...
  29. Re: Pulling Slide Film to Increase Its Dynamic Range

    Yes, finally! What I remember about trannies is that shortening development by even a small amount can result in some interesting (and perplexing) color artifacts. I'm glad someone said it out loud....
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    Re: LF beginner Film

    What I found in my years of LF is that you're really asking the wrong questions. You only need the concepts of "wider lattitude" and "more forgiving" in roll film because you can't develop the...
  31. Re: Tri-filter color images from B&W negatives

    Have you tried a Devin Tri-Color camera? I've never laid hands on one, but they look very interesting.
  32. Re: Color seperation filter used in Drum Scanners

    Yes. This. Color accuracy is what that orange color correction mask is all about.

    One of those other advantages is of greater dynamic range captures. Said another way, color negative films can...
  33. Re: Determining film speed in a hybrid workflow

    I have written a fair amount on this topic in posts on this site. So for more detail, search is your friend.

    To summarize what I found is pretty easy. First, expose for the shadows and develop for...
  34. Re: Color seperation filter used in Drum Scanners

    That's understandable since most manufacturing of drum scanners ended in the mid-late 1990s. You are extremely unlikely to find any third party parts for a drum scanner.



    If that's what you...
  35. Re: Just acquired a Pentax Spot meter with Zone V Conversion

    Yes. This. It really is that simple.
  36. Re: Grain on large format (scanned negative): hp5 plus vs tmax 100

    You don't have enough experience to make a decision. You'll need to put some film through your camera and your process before you can possibly know enough to make a decision.

    That said, you've...
  37. Re: Aztek 8000 Premier, orange/yellow cast near image edge + scan lines

    How about calling Aztek and asking them? If anyone knows for sure, it would be Aztek.
  38. Re: Is this reticulation or grain? - Tri-X 320 4x5 development

    Reticulation.

    What possessed you to torture your film like this? When Kodak says process at 68F, it means the entire process, from end to end.

    So, all your washes should be at 68F. Developer,...
  39. Re: Camera scanning HP5+ and TMax 400 (TMY-2) a comparison

    IMHO TMY-2 is the best B&W film ever made. And probably the best that ever will be made since photographic film R&D is essentially nonexistent at this point.

    My only regret in photography is that...
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    Re: How do you digitize 8x10" sheet film?

    Yes, what Sandy says.
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