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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

1968 Laguna Seca USRRC — pits

April 2, 2015 JimK Leave a Comment

The next few images should give you some idea of what life was like in the pits in 1968. First off, there was a Race Queen, who was presumably chosen for other than her driving talents I don’t know who this guy is, but he’s got a look that’s period-perfect:   Here’s a woman who,… [Read More]

The Last Word

1968 Laguna Seca USRRC — drivers

April 2, 2015 JimK 1 Comment

I recently discovered six pages of 35mm Tri-X negatives of the May, 1968 running of the United States Road Race of Champions (USRRC) at Laguna Seca. I scanned them on a not-very-good flatbed scanner, and will be posting some of them over the next couple of days. Photographically, they’re not much. However, as a look… [Read More]

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Sloof Lirpa announces high dynamic range camera

April 1, 2015 JimK 3 Comments

As is their wont this time of year, the Sloof Lirpa team have produced another blockbuster: this year it’s a camera that provides far greater Engineering Dynamic Range (EDR) than anything on the market today. DxO is currently reporting the best EDRs of a bit over 14 stops. The Sloof Lirpa BigPixel One (BP1) has… [Read More]

The Last Word

Fallen oak tree at dawn

March 31, 2015 JimK Leave a Comment

Sorry, I haven’t been posting at my usual rate lately. I’ve been sick; nothing serious, just this season’s mother of all colds. I did manage to get out a few days ago and make this image of a fallen oak tree as a storm was breaking up.   And here’s my favorite grove of trees… [Read More]

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Test methods for IR hotspotting

March 27, 2015 JimK 5 Comments

I decided that, if I”m going to be able to compare various lenses for hotspotting potential, I need to make the lighting repeatable. That means out with the old, natural light approach, and in with a completely  artificially lit technique. I started out by creating this target: I printed it on a piece of C-sized… [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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  • Mike MacDonald on Your photograph looks like a painting?
  • Mike MacDonald on Your photograph looks like a painting?

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Unless otherwise noted, all images copyright Jim Kasson.