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the last word

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

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Archives for 2013

A tale of two cameras, part 5

January 26, 2013 JimK Leave a Comment

The RX-1 doesn’t have the chromatic aberration that afflicts the Zeiss 24mm f/1.8 on the NEX-7. Look here for NEX-7 pictures. Here’s a scene with high-contrast corners (tree branches against sky) with the RX-1 wide open, with Lightroom lens corrections turned off, but in-camera chromatic aberration correction turned on: Here’s what the branches look like… [Read More]

The Last Word

A tale of two cameras, part 4

January 26, 2013 JimK Leave a Comment

I checked to see if the soft corners wide open on the RX-1 were because of lack of field flatness. When I focused on a corner, the corners were very marginally sharper than when I focused on the center. However, the center was greatly softened when I focused on a corner when compared  to when… [Read More]

The Last Word

A tale of two cameras, part 3

January 26, 2013 JimK 1 Comment

Here‘s a link to the layered psd file with all the images in this post.  As before, I recommend that you look at it if you wish to form your own judgements about these images. At f/2 in the upper right corner, the NEX-7 is substantially sharper, but has lower contrast: RX-1 f/2   NEX-7… [Read More]

The Last Word

A tale of two cameras, part 2

January 26, 2013 JimK 2 Comments

Here is my usual low-contrast distant subject test scene as seen by the RX-1: I did a series of tests with both the RX-1 and the NEX-7/24mm f/1.8 at f/2, f/2.8, f/4, f/5.6, f/8, and f/11. I looked at the center part of the image first. I’m putting up 1:1 jpegs, but the best way… [Read More]

The Last Word

A tale of two cameras, part 1

January 26, 2013 JimK Leave a Comment

It was the best of times, it was the worst of times, it was the spring of digital, it was the autumn of film, it was the end of toxic chemicals, it was the beginning of poisonous third-world recycling, it was the age of a cornucopia of new devices and processes, it was the age… [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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  • JimK on Fujifilm GFX 100S II precision
  • Renjie Zhu on Fujifilm GFX 100S II precision
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  • Ivo de Man on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF

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