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the last word

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

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Archives for January 2009

New off-site backup options

January 29, 2009 JimK Leave a Comment

Only eighteen months have passed since I wrote the paper on backing up photographic images, but there have been some changes that affect the off-site component of the backup strategy that I proposed in that paper. The biggest difference is the price reduction of one terabyte disks. It’s now hovering close to a hundred bucks… [Read More]

Technical, The Last Word

Paper Selection

January 11, 2009 JimK Leave a Comment

Maybe you’re getting tired of reading about blind spots. I know I’m getting a little tired of writing about them. I promised to give it a rest, but first I’ve got a few things to say about one of the most frustrating things in modern digital photography: paper selection. I’ll go through it without the… [Read More]

The Last Word

From Tortoise to Hare

January 10, 2009 JimK Leave a Comment

Over the last year, you may have noticed the performance of this blog diminishing: pages taking longer to load, timeouts, and the navigation tools not loading properly.  If you’re a diligent reader, at the end of December you saw a complete outage for about a day. Since then, performance has increased markedly. Pages load crisply,… [Read More]

Technical, The Last Word

January 2009
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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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  • JimK on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF

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