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You are here: Home / Archives for GFX 50S

GFS 50S high-ISO behavior and LrC development

December 31, 2021 JimK 4 Comments

The GFX 50S, GFX 50R, and GFX 50S Mk II all stop increasing gain for raw file data at ISO 1600. From then on they brighten the finder image and the JPEG preview image in the raw file, and send instructions to the raw developer to do a push to make the brightness match that… [Read More]

GFX 50S

Field curvature in the Fuji GF 35-70

December 29, 2021 JimK 1 Comment

I ran Roger’s Q&D test: https://www.dpreview.com/articles/1351719699/roger-cicala-field-curvature-for-fun-and-profit         This looks really good.

GFX 100, GFX 100S, GFX 50S

No front focusing on Fuji 35-70 GF on GFX 100S

December 28, 2021 JimK 1 Comment

Some people have reported AF front focusing with the Fujifilm 35=70 GF lens wide open at close distances. I tested my copy on a GFX 100S at minimum focusing distance, using a low-contrast Siemens Star. I processed the images in LrC using the defaults except for the white balance and defeating sharpening.   It’s an… [Read More]

GFX 100, GFX 100S, GFX 50S

Fuji 35-70 GF Siemens star visuals, corner

December 26, 2021 JimK Leave a Comment

Here is a continuation of  a visual test of the Fujifilm GF 35-70 using a low-contrast Siemens star target. In the previous post I showed you center crops. In this one we’ll look at corner crops. Test conditions: Target distance 20 meters ISO 100 Manual exposure, varying the f-stops Arca Swiss CA on RRS legs… [Read More]

GFX 100, GFX 100S, GFX 50S, The Last Word

Fuji 35-70 GF Siemens star visuals, center

December 26, 2021 JimK Leave a Comment

After a long wait — Fuji prioritized customers ordering the GFX 50S II kits — I’ve received a copy of the GF 35-70 zoom. The first thing I did was test it to make sure I have a good copy, and it did fine. You can see the results here. I’ve been working on a… [Read More]

GFX 100, GFX 100S, GFX 50S

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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

  • JimK on UniWB on the X2D
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  • Christer Almqvist on Specularity, part 2
  • Alan on A deep dive into histograms
  • stephen on Interim thoughts on the Hasselblad X2D 100C
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  • JimK on Histogram example, normal-contrast scene
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  • JimK on Nikon Z6/7 gotchas and fixes
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