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the last word

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

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Archives for March 12, 2016

Sony a6300 — EDR vs a7II

March 12, 2016 JimK 6 Comments

This is part of a long series of posts about the Sony a6300. The series starts here. I’ve received a request for some context on some of the a6300 graphs I’ve been posting. I’m pleased to respond. Let’s compare the engineering dynamic range of the a6300 to its Sony stablemate, the a7II. In one sense,… [Read More]

The Last Word

Sony a6300 — self heating

March 12, 2016 JimK Leave a Comment

This is part of a long series of posts about the Sony a6300. The series starts here. The Sony a7RII and the a7II both have some self-heating issues when asked to make successive long exposures. The suspicion at the time was that the IBIS systems in both cameras provided some degree of thermal isolation and… [Read More]

The Last Word

Sony a6300 — dark field histograms

March 12, 2016 JimK 5 Comments

This is part of a long series of posts about the Sony a6300. The series starts here. I don’t expect any surprises here, since I’ve dealt with a lot of Sony cameras, but you never know, so I looked at the histograms for all the dark field captures that I made for the plots in… [Read More]

The Last Word

March 2016
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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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