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the last word

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

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Archives for May 2012

What’s a pixel?

May 16, 2012 JimK Leave a Comment

There’s an article in the March/April 2012 issue of photo technique entitled “Mastering the Camera Histogram for Better Exposure”. The article contains some important misstatements. I’m not sure how they got by the magazine’s vetting process, but, if they gain currency by inheriting the stature of the magazine in which they are published, they may… [Read More]

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Slit scans of the fog burning off

May 15, 2012 JimK Leave a Comment

I took some pictures of the fog burning off yesterday morning, and continued in the early afternoon when there was some cloud cover. Here are the pictures in chronological order, which happens to be the order from most to least abstract. 135mm lens, about an hour and a half exposure.        

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Photography and the work ethic

May 14, 2012 JimK 2 Comments

Friday night, I told David Bayles that I was working on photography about four hours a day, and that seemed to be the right amount of time for me. We got into a discussion of the work ethic of some photographers. David said that Brett Weston immediately processed his film upon returning from a photographic… [Read More]

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More slit scan infrared

May 14, 2012 JimK Leave a Comment

Fog burning off yesterday around noon. 47mm lens, about 20 minute exposures.    

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Infrared cirrus

May 9, 2012 JimK Leave a Comment

Last night, I made some infrared slit scan photographs of a spectacular high cirrus formation, using a 47mm lens and my new lens hood (see previous post).  Time runs from right to left. Each exposure was about half an hour long.  

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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Archives

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