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    Re: Matching printer output

    Also, all this stuff about gamuts and rendering intents will make a difference if your image has out-of-gamut colors. If it doesn't, these details won't matter.
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    Re: "good enough" what does it mean to you ?

    It means one notch above inadequate and one or two notches below better than necessary.
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    Re: Please explain diffraction in lenses

    You really have to define your terms here. We respond to some aspects of sound and light in a linear manner, others not. In this case, what we hear is pretty well predicted by what you see in those...
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    Re: Please explain diffraction in lenses

    Maybe you're trying to say something different from what I'm understanding.

    But as I see, you have two slightly out-of-tune sine waves, you add them together, and you get a very low frequency...
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    Re: Please explain diffraction in lenses

    Emmanuel, I may not even understand your question. If you're talking about something besides out-of-tune pipes creating a lower "beating" frequency between them, then I get it. And that's something...
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    Re: Please explain diffraction in lenses

    It would have more accurate to equate musical beating with moiré patterns. These are analogue phenomena and are easily modeled. There is no psychoacoustic component; the beating would register the...
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    Re: Please explain diffraction in lenses

    I'm not trying to prove that our visual systems are purely linear (I'd have to see this defined to even have a hunch one way or another). But what I've seen, in lots of research and in personal...
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    Re: [digression!!] Please explain ... the relevance of MTF curves for the human visi

    For the purposes of perceived sharpness and detail, it's really not as complicated as you're making it out to be. The basics are pretty basic. And with some clever homegrown photoshop experiments you...
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    Re: Please explain diffraction in lenses

    Well, I think for most people shooting large format film, especially if they're enlarging very little, film MTF is unimportant. But not for the reasons you're giving. It's just that most film is...
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    Re: Please explain diffraction in lenses

    Agree 100%, and also that doing so isn't easy.

    Agree also on GIGO, which is of course the case with any system that quantifies anything.

    What I like about MTF is that, while it's complicated...
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    Re: Please explain diffraction in lenses

    It's actually pretty easy. I think it isn't done more often because you'd be modeling (or measuring) exactly one combination of devices, with one set of variables for each. So while the results would...
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    Re: Please explain diffraction in lenses

    Because there are more factors than can be shown in a single two-dimensional graph. Lens makers usually address this by showing MTF for every angle of view, but only at a few spatial frequencies.
    ...
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    Re: Please explain diffraction in lenses

    Agreed 100%. Although I'd suggest that if you learn what to look for, many important correlations become reliable.

    An MTF curve shows contrast at at all spacial frequencies, and there's now ample...
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    Re: Please explain diffraction in lenses

    Where does this understanding come from?
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    Re: What do you consider to be a mural?

    I suppose I'd consider a photo a mural if it were so big or had other qualities that required a permanent installation. I don't really think of something in a frame that hangs from a screw in the...
  16. Re: Black and White book printing, what is the best quality option?

    In my experience, studying the history of something is the best way to find your own path. Without historical perspective, most artists have no idea of the range of things that have been explored,...
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    Re: Nepal Earthquake!

    If you have a PayPal account, it's effortless to donate. Go to the homepage and you can scroll through to your charity of choice. 100% goes to to the organization.
  18. Re: What lens would you consider the sharpest wide open?

    Wouldn't it make sense to figure out what aperture you actually want to use, and look for the lens that sharpest there? The wide-open performance of much faster or slower lenses isn't relevant to...
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    Check out some 1913 color

    Autochromes on the beach ...

    http://mashable.com/2015/04/23/autochrome-photos-ogorman/
  20. Re: Best photography and art books of the past 12 months?

    I haven't been shopping.
    Here's Flakphoto's recommendations for 2014.
  21. Re: Sweet Ruin: The Brooklyn Domino Sugar Refinery

    Thanks so much everyone.
  22. Sweet Ruin: The Brooklyn Domino Sugar Refinery

    I'm going to be launching a Kickstarter campaign in the next couple weeks for my book project. It's a documentary / art / history book on an iconic Brooklyn factory that's just been demolished.

    I...
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    Re: Troubleshoot: Epson 3880 Printing Dark?

    I print a nozzle check before every print job. The 3880 is quite resistant to clogs, but it's always worth this extra step. I just keep a stack of used office paper for this and do the test pattern...
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    Re: Troubleshoot: Epson 3880 Printing Dark?

    Are you comparing to your screen or to a print that you've made in the past from the same file?
  25. Re: Black and White book printing, what is the best quality option?

    Please share what you learn. Sounds interesting.
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    Re: First trip to Yellwostone

    I love fall in that region because the crowds have mostly gone. But the days are getting quite short by October, and there can be lots of of muddy, early season snow.
    Yellowstone is nice for the...
  27. Re: Black and White book printing, what is the best quality option?

    You have a huge advantage over Benson: they're your photographs. So which is an original and which is a reproduction is completely dependent on your attitude toward them.

    I think we can...
  28. Re: Black and White book printing, what is the best quality option?

    I think that's the first edition. Somewhere inside there's a blurb about Richard Benson's process. He made separation plates from the negatives, using methods of his own invention. The book was...
  29. Re: Ansel Adams: Do you fight or embrace his influence on your landscapes?

    Oh yeah, they have a 1st edition of this at the house. I've looked at it. I'm going back in August and will have another look. It's all pictures from that island.



    We go up there to enjoy the...
  30. Re: Black and White book printing, what is the best quality option?

    In the first edition they're quadtones, printed on top of a tint plate, overprinted with varnishes of different textures. In later editions they're duotones (I haven't seen the duotone version).
    ...
  31. Re: Black and White book printing, what is the best quality option?

    See if you can get your hands on an original printing of this one. It changed my thinking completely.
  32. Re: Ansel Adams: Do you fight or embrace his influence on your landscapes?

    I never had much opinion about Porter, but the last few summers i've been spending a week at his old island in Maine ... I'm friends with the family of his brother Fairfield, the painter. Eliot's...
  33. Re: Ansel Adams: Do you fight or embrace his influence on your landscapes?

    I'm not convinced that Porter's work holds up after all these decades. It was interesting in the beginning because color was interesting. But I don't find the use of color interesting in the same...
  34. Re: Ansel Adams: Do you fight or embrace his influence on your landscapes?

    Interesting proposition. Probably a big part about why he became the popular face of the medium in the U.S..

    The closest predecessor may have been the survey photographers, but in those cases the...
  35. Re: What does "Let the Muses guide you" mean, and why is it relevant to LF?

    Amen to that. This gut (or whatever you want to call it) needs to be informed, exercised. I have yet to see a baby enter the world with anything worthwhile to say, by word or picture or saxophone.
    ...
  36. Re: What does "Let the Muses guide you" mean, and why is it relevant to LF?

    I have nothing to add to this.
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    Re: Matching printer output

    In theory, it makes sense to use relative colorimetric when the saturated colors are unimportant (a red light on an instrument panel in the background) and perceptual when they're important (you're...
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    Re: Matching printer output

    With good profiling, you should be able to get near perfect matches. Different ink sets have slightly different color gamuts. One manufacturer's inks may extend farther into the reds and purples,...
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    Re: digital archive questions 1,2,3

    Agreed on all this. But realize that the day may come a when a new technology will convince you to scan again.

    I keep:
    1) the raw scan file (mine aren't truly raw files, but they're loosely...
  40. Re: What does "Let the Muses guide you" mean, and why is it relevant to LF?

    I think you're arguing with me, not Struan.

    But while I would indeed suggest interrogating the muse, there's a right and wrong time. Shut up while she's talking. Write down everything. Goad her...
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