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the last word

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

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Sony a7III raw filtering

April 6, 2018 JimK 5 Comments

The a7III is about to ship in the US — it’s already in the wild elsewhere — and, although it is exceedingly attractively priced, I’m not expecting to be a customer. Nothing wrong with the camera, to my way of thinking, but I just don’t see the utility to someone who already has an a7RIII and… [Read More]

a7III

Sony a9 has an AA filter

April 4, 2018 JimK 8 Comments

Last week, I wrote this post with some surprising news: the Sony a9 has no antialiasing (AA) filter. I was flabbergasted. Turns out, I was wrong. The a9 has a perfectly normal two-way (4-stop) AA filter. So there’s no real news here. Everybody thought the a9 had an AA filter before I shot off my… [Read More]

a9

Speeding up a web site

April 2, 2018 JimK 1 Comment

This begins another series of posts on my experiences in optimizing my web gallery and blog presence. Like the last set of posts I did on this subject, it could just as well be posted on The Bleeding Edge, but, since I figure that my struggles with this issue will be useful to most photographers… [Read More]

The Last Word

Siri and the iPhone camera

April 1, 2018 JimK 1 Comment

So far, Apple has just scratched the surface when it comes to integrating Siri with the iPhone’s camera. You can say, “Hey, Siri, bring up the camera,” but that’s about it. Siri won’t trip the shutter, zoom the lens, or even close the app. As of today, all that’s over. Sloof Lirpa just announced their… [Read More]

The Last Word

Why I don’t post raws

March 26, 2018 JimK 7 Comments

In another forum, a reader asked for the raw files associated with one of my Last Word posts. He wouldn’t tell me why he wanted them or what he was going to do with them, so it was a no-brainer to decline. He was not pleased. The incident did have an upside, though: it got… [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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Unless otherwise noted, all images copyright Jim Kasson.