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Archives for October 14, 2015

Bill Claff’s web site has moved

October 14, 2015 JimK Leave a Comment

If you’re interested in photographic tech and you’re not scared of quantitative information, my guess is that you’ll like BIll Claff’s web site, He’s gotten many people to test cameras to his protocols, and he reports the results with interactive graphs that allow easy comparison. In addition, there’s a wealth of information on what’s inside… [Read More]

The Last Word

Aesthetics as a factor in photographic equipment choice

October 14, 2015 JimK Leave a Comment

I’ve got to stop hanging around over at DPR. Not only is it a time sink, I keep getting ideas for posts to write here. Yesterday, a guy was asking one of the “what lens should I buy for xyz?” questions that are the stock in trade of camera forums. In the discussion, he rejected… [Read More]

The Last Word

MTF testing of 70-200mm lenses — AF or MF?

October 14, 2015 JimK 1 Comment

I’ve been reporting on the modulation transfer function results from some lens/sensor testing that I’ve been doing. I few days ago, I show you some work that I’d done with the Nikon 70-200 f/2.8 GII ED on the Nikon D810 to the Sony 70-200 f/4 G OSS FE on a Sony a7RII. For those tests,… [Read More]

The Last Word

October 2015
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Articles

  • About
    • Patents and papers about color
    • Who am I?
  • Good 35-70 MF lens
  • How to…
    • Backing up photographic images
    • How to change email providers
  • 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 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

  • Bek on Hasselblad X2D, GFX 100S shadow noise, visuals
  • Steven on FF equivalent focal lengths of Hasselblad XCD, Fuji GF lenses
  • JimK on Backing up photographic images
  • Jeff Wolford on Backing up photographic images
  • Barry Goyette on My lack of productivity
  • JimK on Scanning black-and-white negatives with a GFX 100S
  • Andrew Freeman on Scanning black-and-white negatives with a GFX 100S
  • JimK on Sony a7RIV continuous drive mode precision
  • Richard Creamer on Sony a7RIV continuous drive mode precision
  • JimK on Smallrig L-bracket for Nikon Z9

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