the last word

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Stitched panos: slide or spin?

February 4, 2013 JimK Leave a Comment

I’ve been following an email thread by some sophisticated and accomplished photographers that has touched on making stitched panos with (mostly) medium format technical cameras. The discussion has been almost entirely about lenses and backs/bodies that are appropriate to sliding panos. Since that’s not the way I make panos, I started wondering what I’m missing…. [Read More]

The Last Word

Testing for ETTR, part 8

December 7, 2012 JimK Leave a Comment

In a comment to this post, a reader asked me to compare the ad hoc color balance adjustment technique that I developed a few days ago with the UniWB technique. I’d not been aware of that approach. It turns out the goal is the same: to get the in-camera histogram to approximate the true raw… [Read More]

The Last Word

Large format likes

April 23, 2012 JimK Leave a Comment

Doing slit scan photography has thrust me back into the world of large-format picture taking, a world that I once knew well. It’s also forced me to confront the pleasures and pains of using a scanning back, but that’s a discussion for another post. Some aspects of large-format photography haven’t changed much over the years,… [Read More]

The Last Word

Cutting the laser printer cord

October 10, 2011 JimK 2 Comments

For 25 years, I’ve always had a laser printer at my disposal. I got my first one, the original Hewlett-Packard LaserJet, in 1984. I was handling the technical integration between Rolm and IBM at the time, and I was writing a lot of memos. I used an IBM PC and Microsoft Word for that. Rather… [Read More]

The Bleeding Edge

X-Rite I1 Publisher/I1 Pro OOBE, part 6

May 3, 2011 JimK Leave a Comment

I got an e-mail from X-Rite support this afternoon asking for more information. I sent it off. Meanwhile, encouraged by the fact that I had finally made a profile, albeit a terrible one, I started over. I printed a new 400-sample test target, and was able to measure it with only one bad row. After… [Read More]

The Bleeding Edge

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Articles

  • About
    • Patents and papers about color
    • Who am I?
  • Good 35-70 MF lens
  • How to…
    • Backing up photographic images
    • How to change email providers
  • Lens screening testing
    • Equipment and Software
    • Examples
      • Bad and OK 200-600 at 600
      • Excellent 180-400 zoom
      • Fair 14-30mm zoom
      • Good 100-200 mm MF zoom
      • Good 100-400 zoom
      • Good 100mm lens on P1 P45+
      • Good 120mm MF lens
      • Good 18mm FF lens
      • Good 24-105 mm FF lens
      • Good 24-70 FF zoom
      • Good 35 mm FF lens
      • Good 60 mm lens on IQ3-100
      • Good 63 mm MF lens
      • Good 65 mm FF lens
      • Good 85 mm FF lens
      • Good and bad 25mm FF lenses
      • Good zoom at 24 mm
      • Marginal 18mm lens
      • Marginal 35mm FF lens
      • Mildly problematic 55 mm FF lens
      • OK 16-35mm zoom
      • OK 60mm lens on P1 P45+
      • OK Sony 600mm f/4
      • Pretty good 16-35 FF zoom
      • Pretty good 90mm FF lens
      • Problematic 400 mm FF lens
      • Tilted 20 mm f/1.8 FF lens
      • Tilted 30 mm MF lens
      • Tilted 50 mm FF lens
      • Two 15mm FF lenses
    • Found a problem – now what?
    • Goals for this test
    • Minimum target distances
      • MFT
      • APS-C
      • Full frame
      • Small medium format
    • Printable Siemens Star targets
    • Target size on sensor
      • MFT
      • APS-C
      • Full frame
      • Small medium format
    • Test instructions — postproduction
    • Test instructions — reading the images
    • Test instructions – capture
    • Theory of the test
    • What’s wrong with conventional lens screening?
  • Previsualization heresy
  • Privacy Policy
  • Recommended photographic web sites
  • Using in-camera histograms for ETTR
    • Acknowledgments
    • Why ETTR?
    • Normal in-camera histograms
    • Image processing for in-camera histograms
    • Making the in-camera histogram closely represent the raw histogram
    • Shortcuts to UniWB
    • Preparing for monitor-based UniWB
    • A one-step UniWB procedure
    • The math behind the one-step method
    • Iteration using Newton’s Method

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