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the last word

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

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Fujifilm 20-35/4 GF distortion

October 6, 2022 JimK 4 Comments

I’ve received requests to take a look at the distortion of the Fujifilm 20-35/4 GF on the GFX 100S. This being a thoroughly modern lens on an equally-modern camera, there are two kinds of distortion to consider. The first is the distortion the lens produces on the sensor, and the second is what you see… [Read More]

GFX 100S

Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF

October 6, 2022 JimK 14 Comments

There are many landscape photographers looking at the new Fuji 20-35/4 and saying, “It’s about the same weight and size as the 23mm f/4 GF prime. Why don’t I ditch my 23 and go with this more versatile lens?” What’s wrong with that idea? For sharpness and distant subject field curvature, not much. I started… [Read More]

GFX 100S

A tale of two lens shades

October 5, 2022 JimK 2 Comments

The last two lenses that I bought have quite different lens shades. The one on the left is for the Hasselblad XCD 38 mm f/2.5 lens. The one on the right is for the Fuji 20-35 mm f/4 GF lens. The one on the left is made of metal. The one on the right is… [Read More]

The Last Word

Fuji 20-35 f/4 landscape field curvature at 35mm

October 5, 2022 JimK 9 Comments

I’ve reported on significant field curvature with the Fujifilm 20-35mm f/4 GF lens. The purpose of this post is to see how that field curvature affects landscape images in landscape orientation. In this post, I’ll report on how the lens did at 35 mm focal length. In the previous posts, I looked at the performance… [Read More]

GFX 100S

Fuji 20-35 f/4 landscape field curvature at 28mm

October 5, 2022 JimK Leave a Comment

I’ve reported on significant field curvature with the Fujifilm 20-35mm f/4 GF lens. The purpose of this post is to see how that field curvature affects landscape images in landscape orientation. In this post, I’ll report on how the lens did at 28 mm focal length. In the previous post, I looked at the performance… [Read More]

GFX 100S

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Articles

  • About
    • Patents and papers about color
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  • How to…
    • Backing up photographic images
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  • 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
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    • Found a problem – now what?
    • Goals for this test
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    • Test instructions — postproduction
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    • Theory of the test
    • What’s wrong with conventional lens screening?
  • Previsualization heresy
  • Privacy Policy
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  • 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

  • bob lozano on The 16-Bit Fallacy: Why More Isn’t Always Better in Medium Format Cameras
  • JimK on Goldilocks and the three flashes
  • DC Wedding Photographer on Goldilocks and the three flashes
  • Wedding Photographer in DC on The 16-Bit Fallacy: Why More Isn’t Always Better in Medium Format Cameras
  • JimK on Fujifilm GFX 100S II precision
  • Renjie Zhu on Fujifilm GFX 100S II precision
  • JimK on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF
  • Ivo de Man on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF
  • JimK on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF
  • JimK on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF

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Unless otherwise noted, all images copyright Jim Kasson.