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the last word

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

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Archives for 2015

A book report: more on gamut mapping

July 2, 2015 JimK 1 Comment

This is post fourteen in a series about my experiences in publishing a book. The series starts here. Earlier in this series, I’ve reported on mapping the images for the book into the rather small GRACoL 2006 Coated color space used by the printer. Today, Brooks Jensen taught me a new-to-me tool for gamut mapping…. [Read More]

The Last Word

Working on photography 24/7

July 1, 2015 JimK 3 Comments

If you don’t do photography in series, you go out and photograph with a brand new plan every time, or maybe no plan at all. You get better a photography as time goes by because you learn what works and what doesn’t, but the only time you’re thinking about photographing is when you’re capturing or… [Read More]

The Last Word

In praise of repetition

June 30, 2015 JimK 4 Comments

This post is self-plagiarized from a couple of earlier posts in this blog, with new material added. In this blog and elsewhere, I’m always posting images of the same subject matter over and over. I run in spurts. This year, I started out with the stitched infrared trees, moved on to hills across the valley… [Read More]

The Last Word

Lens sample variation

June 29, 2015 JimK Leave a Comment

If you’re reading my blog, you probably have a technical bent, or at least a tolerance for a little math. If that’s the case, I think you’ll enjoy this article by LenRentals’ Roger Cicala on sample variation in lens performance.

The Last Word

Book report: full bleed images

June 24, 2015 JimK Leave a Comment

This is post thirteen in a series about my experiences in publishing a book. The series starts here. Now that I’ve decided on page size for the book, it’s time to think about the full bleed images. For those of you not familiar with the term, in the printing business, full bleed refers to images… [Read More]

The Last Word

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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

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