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the last word

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

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Archives for October 2016

A book report — the books arrive

October 19, 2016 JimK Leave a Comment

This is part of a series about my experiences in publishing a book. The series starts here. The books showed up yesterday. Although FedEx did load them on a smaller truck than the 18-wheeler they tried to use Friday, the truck is still pretty big: First thing off the truck is the mailers, which are shipped… [Read More]

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Sony a7RII current draw

October 18, 2016 JimK 17 Comments

There have been some complaints about the Sony a7RII battery drain when turned off. There have always been complaints about how fast the camera drains its pint-sized batteries when the camera is on. So far, the discussions have been usually qualitative, and, even when quantitative, not reproducible. I thought that there was probably a way… [Read More]

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A book report — Semis & ISBNs

October 17, 2016 JimK Leave a Comment

This is part of a series about my experiences in publishing a book. The series starts here. On Thursday, I got a call from FedEx in Salinas, saying that they had my books, and wanted to arrange a delivery time. We agreed on Friday afternoon, and also agreed that they’d load the books in a bobtail… [Read More]

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Sony a7RII maximum continuous frame rates

October 16, 2016 JimK 8 Comments

I’m going to be doing some synthetic slit scans with the Sony a7RII, and I needed to figure out what frame rate the camera could sustain on a continuous basis, so I did some testing. Thinking that others might be interested in the results, I’m sharing them here. Test conditions Sony a7RII Lexar Professional 1000X (150… [Read More]

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And the winner is…

October 14, 2016 JimK 1 Comment

Yesterday, I posted all the images that I entered in the Center for Photographic Art’s 2016 Juried Exhibition. Here’s the one the juror picked: This is an image of a bunch of Pez dispensers in the window of a shop in Santa Fe. It has been extensively reworked at the hands of a Matlab program… [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

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