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70-200/2.8 E vs S at 200mm, more quantitative

October 13, 2020 By JimK 4 Comments

This is the twelfth in a series of posts about the Nikon 70-200 mm f/2.8 S lens for Nikon Z cameras. The series starts here. Yesterday, I told you about the quantitative differences that Imatest and I found between the Nikon 70-200 mm f/2.8 S and E lenses using a slanted edge and a Siemens… [Read More]

70-200/2.8 E vs S at 200mm, quantitative

October 12, 2020 By JimK Leave a Comment

This is the eleventh in a series of posts about the Nikon 70-200 mm f/2.8 S lens for Nikon Z cameras. The series starts here. In a previous post in this series, I found that my copy of the Nikon 70-200 mm f/2.8 S wasn’t quite up to the high standard set by the F-mount… [Read More]

Sony 135 mm STF on GFX 50R

October 10, 2020 By JimK 4 Comments

Yesterday I received a Fotodiox Sony A to GFX adapter, and today I mounted a Sony 135 SLT (apodized) lens on it. I mounted the lens on a GFX 50R.   To my surprise and great pleasure, it covers the 33×44 format with no vignetting. The equivalent FF focal length for the same image height… [Read More]

Nikon 70-200/2.8 S corner transition point spread functions

October 10, 2020 By JimK Leave a Comment

This is the tenth in a series of posts about the Nikon 70-200 mm f/2.8 S lens for Nikon Z cameras. The series starts here. In the previous post, I looked at transitional point spread functions on axis. In this post, I’m going to do the same in the corner. As before, I used a… [Read More]

Nikon 70-200/2.8 S transition point spread functions

October 9, 2020 By JimK Leave a Comment

This is the ninth  in a series of posts about the Nikon 70-200 mm f/2.8 S lens for Nikon Z cameras. The series starts here. In the previous post, looked at point spread functions across the image field when the lens was well out of focus. This is one piece of  bokeh. The other is… [Read More]

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January 2021
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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
  • 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

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Unless otherwise noted, all images copyright Jim Kasson.