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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

Zony & Otus 55’s on a7R, D810 — edge sharpness

May 28, 2015 JimK 1 Comment

This is a continuation of the real-world, informal testing of the Sony/Zeiss 55mm f/1.8 Sonnar FE (Zony 55) and the Zeiss 55mm f/1.4 Otus ZF.2 lenses on the Sony alpha 7R (a7R) and Nikon D810 cameras. The overall scene is in the previous post. In this post, I’ll present edge captures at various apertures from… [Read More]

The Last Word

Zony & Otus 55’s on a7R, D810 — evenness

May 28, 2015 JimK 1 Comment

There have been two controversies floating around the ‘net recently. Is the Sony/Zeiss Sonnar 55/1.8 FE (Zony 55) the equal of the four-or-five-times-more-expensive Otus 55/1.4? Is the D810 somehow sharper than the a7R? I’ve got my own thoughts on both issues, but rather than just bloviate, I prefer to do some tests and report the… [Read More]

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Process vs result

May 26, 2015 JimK 2 Comments

A couple of days ago I wrote about job satisfaction, and how, for, me it didn’t always correlate with enjoyment of the process of doing the work. Today I’ll take money out of the equation, and try to tease apart how process and result affect satisfaction and pleasure with performing a given task. The novelist… [Read More]

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Does the D810 EFCS work with the intervalometer?

May 25, 2015 JimK 1 Comment

The Nikon D810 EFCS is a little finicky in use. To get it to work, you have to turn it on in the menu, and set the shutter control dial in Mup position. When that’s done, the first press of the shutter button will raise the mirror and open the mechanical shutter, and the second… [Read More]

The Last Word

Doing it for money

May 24, 2015 JimK Leave a Comment

When I graduated from college, I was equipped for two professions. I could be an electrical engineer; I had a BSEE to testify to my training, and summer and part-time jobs gave me a limited amount of experience. I could have been a photographer; I had no formal training, but eight years of working on… [Read More]

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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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