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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 2019

On the thinness on the ground of accidental PDAF banding

February 27, 2019 JimK Leave a Comment

It has been remarked that there aren’t a lot of images sloshing around the ‘net that show PDAF banding which were created in situations not involving camera testing. Why is that? Several things would all have to come together: A high-DR scene with sufficient lighting intensity to expose at near base ISO. Right off the bat that… [Read More]

Nikon Z6/7

Violins and cameras revisited

February 27, 2019 JimK Leave a Comment

I mentioned the violin proverb If you buy a violin, you own a violin; if you buy a camera, you are a photographer. to a violinist on the DPR MF forum, and attributed it to a friend who is both a musician and a photographer. I thought that what the violinist wrote back was dead… [Read More]

The Last Word

Nikon Z7 PDAF banding FAQs

February 25, 2019 JimK 10 Comments

The purpose of this post is to answer a set of questions that have come up about the Nikon Z7 PDAF banding issue. First off, let me say that this set of artifacts is by no means a crippling flaw in the camera. In fact, I think that almost all photographers, almost all the time,… [Read More]

Nikon Z6/7

Visibility of Nikon Z7 PDAF banding

February 24, 2019 JimK 4 Comments

Much has been made of the fact that most of the images posted on the web to illustrate the PDAF shadow banding in the Nikon Z7 involve aggressive pushes, and there are those who say that such pushes have no place in real-world photography, and that therefore the Z7 shadow banding is not an issue… [Read More]

Nikon Z6/7

Breakthrough Photography step-up rings

February 23, 2019 JimK Leave a Comment

Many of you know about Breakthrough Photography’s excellent filters. I use a lot of step-up rings, preferring to buy filters in 77 and 86 mm sizes. A few days ago I found out that Breakthrough makes such rings. I’ve never been completely satisfied with the brass rings from other vendors (and the aluminium ones are… [Read More]

The Last Word

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February 2019
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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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