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the last word

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

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Archives for April 2014

The Pentax 645Z

April 16, 2014 JimK 4 Comments

There have been rumblings for months about a new Pentax 645 based on the Sony 50MP 33x44mm chip that’s in the Phase One IQ250 and the Hasselblad H5D-50c. The buzz was that it would be cheap (for a medium format camera) and that Ricoh would put some marketing, service, and distribution wood behind the camera… [Read More]

The Last Word

How to expose the moon?

April 15, 2014 JimK 1 Comment

Last night’s lunar eclipse occasioned a flurry of web traffic about how to set your camera to expose it correctly. I got to thinking – not always a good thing – about the problem, and the more I thought about it the harder it seemed. Let’s assume that you’re making an image and you know… [Read More]

The Last Word

How much image quality is enough?

April 14, 2014 JimK 5 Comments

When we photographers capture images, how much quality should we strive for? A lot depends on how much we know about the eventual use of the image. Why not just strive for the highest possible quality? Once you say that’s your goal, you’ve signed up for very expensive equipment, the use of a tripod almost… [Read More]

The Last Word

A new gallery

April 8, 2014 JimK Leave a Comment

I’ve made some changes to the gallery section of the main web site. Actually, Robin Ward, who writes all the web site code and does all the heavy lifting, made the changes, and I am thankful to her. Anyway, the slit scans that had been in the New Work gallery are now in a gallery… [Read More]

The Last Word

Cleaning up sidecar files

April 7, 2014 JimK Leave a Comment

My autohalftoning workflow has evolved to something like the following. Write some code Parameterize it. Find some parameters that produce interesting results Set up the software to do some ring-arounds Import the ring-arounds into Lightroom Delete all but the good ones Manually remove the orphaned sidecar files. The last step is not a lot of… [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

  • Mike MacDonald on Your photograph looks like a painting?
  • Mike MacDonald on Your photograph looks like a painting?
  • 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

Archives

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Unless otherwise noted, all images copyright Jim Kasson.