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

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Archives for 2016

Sony a6300 — underexposure and pushing in post

March 17, 2016 JimK 3 Comments

This is part of a long series of posts about the Sony a6300. The series starts here. We saw in the a6300 read noise tests that I posted earlier that the input-referred read noise of the Sony 6300 in single shot shutter mode didn’t vary much from ISO 100 to 320 and from ISO 400… [Read More]

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Sony a6300 — PRNU

March 16, 2016 JimK Leave a Comment

This is part of a long series of posts about the Sony a6300. The series starts here. Pixel response non-uniformity, or PRNU, doesn’t get much notice these days. That’s because, with most modern cameras,  it’s so low that it doesn’t affect normal photography. I didn’t expect the a6300 to be any different, but I looked… [Read More]

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Sony a6300 — read noise modeling

March 15, 2016 JimK 4 Comments

This is part of a long series of posts about the Sony a6300. The series starts here. Warning. This is going to be a nerdy post, even by the standards of this blog. If digital camera design and computer simulation is of no interest to you, step away from the computer; there’s nothing to see… [Read More]

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Sony a6300 — silent shutter speed

March 14, 2016 JimK 5 Comments

This is part of a long series of posts about the Sony a6300. The series starts here. The Sony a6300 has a silent shutter mode. When running silent, the mechanical shutter is on vacation, lying back and catching Z’s while the sensor does all the work. The mechanical shutter is a rabbit, completing an exposure… [Read More]

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Sony a6300 — Batis 85/1.8 MTF50 vs a7RII

March 13, 2016 JimK 4 Comments

This is part of a long series of posts about the Sony a6300. The series starts here. You’re probably not gonna use your Otus 85 on an a6300, so sharpness comparisons between the two cameras probably aren’t of much practical use. But you might use your Batis on the a6300. How much sharpness do you… [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

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