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the last word

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

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Archives for 2012

NEX-7 — RRS tripod plate

January 30, 2012 JimK Leave a Comment

I‘ve been using the Really Right Stuff NEX-7 baseplate for a few days. I can recommend it, with one caveat. The first thing you should ask yourself is, “Do I really want to use this camera on a tripod?” The answer could well be no; one of the great arguments for the camera is its… [Read More]

The Last Word

Noise vs resolution — part 8

January 29, 2012 JimK 2 Comments

In this post, I compare the Sony NEX-7 with the Nikon D3s operated in full-frame mode, with the Sony images resized to the Nikon’s 12 megapixels. I used the Nikkor 35mm f/2 D on the NEX-7, and the Nikkor 50mm f/1.4 G on the D3s, providing approximately the same angle of view. The NEX-7 did… [Read More]

The Last Word

Noise vs resolution — part 7

January 28, 2012 JimK Leave a Comment

In this post, I extend the testing done at ISO 3200 to 6400 and 12800. Same deal as in the previous posts, but I’ve dropped the NEX-5. Cameras: Sony NEX-7 and Nikon D3s. The Nikon was set to DX mode, giving it the same sensor size as the 24 megapixel Sony, but with only a… [Read More]

The Last Word

Noise vs resolution — part 6

January 27, 2012 JimK Leave a Comment

Why does the technique of the previous post work? I think it may be a combination of the following: I didn’t use liveview to focus the D3s reference image, so it could be slightly less well focused than the Sony images. I will use liveview in future testing, although it increases noise by heating the… [Read More]

The Last Word

Noise vs resolution — part 5

January 26, 2012 JimK 2 Comments

I have exciting news. At least, it’s exciting to me. Your reaction may be, “Kasson, you really need to get out more.” Anyway, after many unsuccessful attempts, detailed in the previous posts, to tame the NEX-7 high-ISO noise by reducing the resolution of the image, I finally found something that works. Here’s the recipe. Go… [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

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