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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 2017

A test that got away

February 13, 2017 JimK 4 Comments

This morning, I started out to do a test of the new Nikon 70-200/2.8 zoom. I wanted to test it on the highest-resolution body that I had, which is the Sony a7RII. I mounted the lens on a Vello LAE-SE-NF adapter, and the pair to the body. Since the new 70-200 has electronic diaphragm control,… [Read More]

The Last Word

A book report — disassembling a Blurb book

February 12, 2017 JimK 5 Comments

This is part of a series about my experiences in publishing a book. The series starts here. Yesterday, a reader commented on my disassembly of Staccato: “Does this endeavor end up being yet another argument for (color managed) digital books?” I don’t think so. Whatever deficiencies afflict the binding of Staccato pale in comparison with the… [Read More]

The Last Word

A book report — mull survey

February 11, 2017 JimK Leave a Comment

This is part of a series about my experiences in publishing a book. The series starts here. In yesterday’s post, I took apart a copy of Staccato, and learned that the reason  the pages weren’t laying flat was that the part of the mull in the spine area was too stiff to allow it to do… [Read More]

The Last Word

A book report — disassembly

February 10, 2017 JimK 4 Comments

This is part of a series about my experiences in publishing a book. The series starts here. A blogger discovered this series of posts, and wrote that pretty much everything that I did in getting my book out was wrong. I disagreed with some of that, but I certainly admit that this whole endeavor was a… [Read More]

The Last Word

Frequency domain sensor analysis

February 2, 2017 JimK Leave a Comment

For some time now, I’ve been analysing dark field photographs in the frequency domain for clues to whether or not cameras are applying spatial filtering to their raw files. I started when I was investigating why the Sony a7S suddenly had a better engineering dynamic range (EDR) when the ISO knob was turned from 50000… [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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