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

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Archives for 2024

The Nikon Zf has both an AA filter and pixel shift

February 13, 2024 JimK Leave a Comment

In the previous post, I said: …I’ll accept for the purposes of this discussion that no camera manufacturer uses pixel shift on cameras that have AA filters. I don’t know that that’s true, but I can’t think of any counterexamples. Erik Kaffehr found a counterexample, the Nikon Zf. In the spirit of scientific reproducibility, I… [Read More]

The Last Word

4-shot pixel shift and AA filters

February 11, 2024 JimK 7 Comments

This might turn out to be just one more hopeless “there’s something wrong on the Internet, and I must fix it” posts, but maybe it can rise above that. I’ll do my best. In a DPR forum, there is a thread about 4-shot pixel shifting. Under that protocol, which is available on Bayer color filter… [Read More]

The Last Word

Why are my developed files so big?

January 31, 2024 JimK 2 Comments

This is a pretty basic question, but I’ve been asked it a few times, and so I’m creating a post to which I can refer people. My raw file is x bytes, and when I develop it, it’s 3 times that big. How come? I’ll first answer the question assuming both files are uncompressed. Most… [Read More]

The Last Word

Visible noise and CFA filter spectra, part six

January 28, 2024 JimK 3 Comments

I’ve added 17 more cameras to my test suite. The results:         Same trends apply. Older CCD cameras are worse for SMI, except for the NEX-5N, which has lousy SMI. Not a lot of difference wrt the CFA’s effect on noise.

The Last Word

Using InDesign to lay out an exhibition

January 25, 2024 JimK 8 Comments

In the past, when there’s been no curator to sequence, size, and position the images for an exhibition, I’ve done it using Visio. I’ve got an exhibition coming up, and there’s no curator, so I need to do the lay0ut myself. This time, I decided to see if I could use InDesign. Turns out it… [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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