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  1. Replies
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    Re: Xtol - Distilled vs Filtered water

    Indeed, it is not. XTOL is sensitive to dissolved iron. Conventional filtration won't take out the iron. Enough iron and you get "sudden XTOL failure" IIRC (search for it on this site -- it was...
  2. Re: Is it worth it to use the Speed Graphic handheld from time to time?

    Margaret Bourke-White was the master of handheld 5x4. She put many many covers on Life Magazine, at least some of which were hand-held. Dorothea Lang was another world famous hand-held expert.

    Can...
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    Re: How sharp can I expect from 4X5

    First, define "sharpness".

    There are many reasons to use LF. My primary reason was the separation of the film plane and the lens plane so that I could use movements to control the plane of exact...
  4. Re: Comparison of Howtek 8000 Resolve to Epson V850

    Half of what you get from a drum scanner is fluid scanning. I wouldn't give you $0.05 for a dry scanned image from a drum scanner.

    Sadly, like you I wasted a bunch of time when I first got my...
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    Re: ISO Question

    They would be, yes. Two stops over exposure. You could try developing one stop less. You could go two stops less if you have sufficient development time available. Else you risk streaking.

    But...
  6. Re: 150mm lens suggestion for landscapes on a Cambo 45NX

    I've got one (S version). Love it. Probably 30% of my images are from this lens. It's got plenty of coverage so you can play with movements (how else you gonna learn?), and it's sharp as a tack. Hard...
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    Re: long exposure light leak?

    If it's consistent across film holders, it's the camera and not the film holders. Most likely the springs that pull the back toward the camera body to "squeeze" the film holder aren't doing the job...
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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...
  9. 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...
  10. 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...
  11. 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...
  12. 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:
  23. 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...
  26. 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...
  31. 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...
  33. 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...
  36. 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...
  38. 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.
  39. 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...
  40. 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...
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