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the last word

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

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Archives for February 2015

Learning on the job

February 22, 2015 JimK 1 Comment

No Battle Plan Survives Contact With the Enemy Thus spoke German military strategist Helmuth von Moltk. He was apparently right about war. The obvious corollary certainly applies to photography. And thus it is with my infrared trees series. Let’s start with lenses. I started out with the LifePixel-modified Sony alpha 7, the Coastal Optical 60mm f/4,… [Read More]

The Last Word

Screen resolution for print simulation

February 21, 2015 JimK 1 Comment

We saw a couple of days ago that viewing 36MP images on-screen at 2:1 exposed flaws that were invisible in 19×12.67 inch prints from an Epson 4900 on Exhibition Fiber paper, even upon close inspection with reading glasses, but not with a loupe. I need to add one more specification into the mix: the monitor… [Read More]

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Tribalism and Internet photo forums

February 20, 2015 JimK 5 Comments

Monterey, California has a rich and varied photographic history. To this day there are many serious photographic artists in the region. Living here, I get the chance to work with many of them. Photography is a technical pursuit. When you’re trying to make art, the tech stuff is the yin to the art’s yang. You… [Read More]

The Last Word

Lens quality and moderate-sized prints

February 19, 2015 JimK 5 Comments

Over on Digital Photography Review, a poster whose opinion I respect said something like: “Why are you thinking about buying really expensive lenses; you won’t see any difference unless you’re making five-foot prints.” I’d heard that before. I’d also heard that you could tell the difference between images from good lenses at screen resolution. Who… [Read More]

The Last Word

More IR panos

February 18, 2015 JimK Leave a Comment

Three from this morning, exposed as the fog burned off.  

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

  • bob lozano on The 16-Bit Fallacy: Why More Isn’t Always Better in Medium Format Cameras
  • JimK on Goldilocks and the three flashes
  • DC Wedding Photographer on Goldilocks and the three flashes
  • Wedding Photographer in DC on The 16-Bit Fallacy: Why More Isn’t Always Better in Medium Format Cameras
  • JimK on Fujifilm GFX 100S II precision
  • Renjie Zhu on Fujifilm GFX 100S II precision
  • JimK on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF
  • Ivo de Man on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF
  • JimK on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF
  • JimK on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF

Archives

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