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the last word

Photography meets digital computer technology. Photography wins -- most of the time.

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Archives for 2016

More slit scan experiments — fun with wind shear

November 24, 2016 JimK 2 Comments

This post is part of a series about some experiments I’m doing combining space and time in slit scan photographs. The series starts here. This morning I saw a set of images that had been processed overnight, and I got pretty excited. What makes these image so different from yesterday’s? I think it the presence… [Read More]

The Last Word

More slit scan experiments — a bit of progress

November 23, 2016 JimK 2 Comments

This post is part of a series about some experiments I’m doing combining space and time in slit scan photographs. The series starts here. I’m beginning to get some images I like from the current slit scan series. I am experimenting with running the synthetic slit from right to left as well as the other… [Read More]

The Last Word

More slit scan experiments — a bug

November 20, 2016 JimK 1 Comment

This post is part of a series about some experiments I’m doing combining space and time in slit scan photographs. The series starts here. Sometime, when you’re developing image processing code, the bugs are almost as interesting as the images produced when the code works as designed. This is the result of a little programming… [Read More]

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More slit scan experiments — clouds

November 18, 2016 JimK Leave a Comment

This post is part of a series about some experiments I’m doing combining space and time in slit scan photographs. The series starts here. On Wednesday, I made a series of about 9000 photographs 1 second apart using the Sony a7RII and a Zeiss 135mm f/2 Apo-Sonnar. I was able to get that speed by… [Read More]

The Last Word

More slit scan experiments — processing speed

November 16, 2016 JimK 6 Comments

This post is part of a series about some experiments I’m doing combining space and time in slit scan photographs. The series starts here. The experiments that I’m doing can  use a lot of computer resources, if you’re not paying attention, and even if you are.  I decided to scale the 8000 pixel-wide images down… [Read More]

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Articles

  • About
    • Patents and papers about color
    • Who am I?
  • How to…
    • Backing up photographic images
    • How to change email providers
    • How to shoot slanted edge images for me
  • 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 35-70 MF 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

Category List

Recent Comments

  • JimK on Calculating reach for wildlife photography
  • Geofrey on Calculating reach for wildlife photography
  • Javier Sanchez on The 16-Bit Fallacy: Why More Isn’t Always Better in Medium Format Cameras
  • Mike MacDonald on Your photograph looks like a painting?
  • Mike MacDonald on Your photograph looks like a painting?
  • bob lozano on The 16-Bit Fallacy: Why More Isn’t Always Better in Medium Format Cameras
  • JimK on Goldilocks and the three flashes
  • DC Wedding Photographer on Goldilocks and the three flashes
  • Wedding Photographer in DC on The 16-Bit Fallacy: Why More Isn’t Always Better in Medium Format Cameras
  • JimK on Fujifilm GFX 100S II precision

Archives

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