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Archives for 2022

Field curvature in the Fuji GF 35-70, part 2

January 3, 2022 JimK 2 Comments

In a previous post, I tested the field  curvature of the Fuji 35-70 GF using Roger Cicala’s quick and dirty method. A reader said he was having difficulty with what appeared to be field curvature in the corners. That gave me an idea for a modifications of Roger’s test. I rolled the camera so that… [Read More]

GFX 100, GFX 100S, GFX 50S

MTF50 and microcontrast of Fuji 35-70 GF

January 3, 2022 JimK 2 Comments

I finally got around to doing some quantitative tests on the Fuji 35-70 GF. This is the first of several posts with the results of those tests. Here’s the test protocol: RRS carbon fiber legs C1 head 35, 45, and 70 mm focal length Target distance as per the table below ISO 100 Electronic shutter… [Read More]

GFX 100, GFX 100S, GFX 50S

GF 35-70 and 32-64, foliage, corner

January 1, 2022 JimK 1 Comment

  In the previous post, I compared the Fuji 35-70 GF against the 32-64 GF using foliage as the subject. I looked at the center of the images there; now I’ll look at the corner performance. I set up the GFX 100S as follows: RRS 4-series Versa legs Arca-Swiss C1 2-second self timer ES ISO… [Read More]

GFX 100, GFX 100S, GFX 50S

GF 35-70 and 32-64, foliage, on axis

January 1, 2022 JimK 2 Comments

  I set up on one of my usual foliage test scenes, shown here with the 35-70 at 35 mm wide open.   I set up the GFX 100S as follows: RRS 4-series Versa legs Arca-Swiss C1 2-second self timer ES ISO 100 AF-S for three shots, picking the best sharpness in post; this calibrates… [Read More]

GFX 100, GFX 100S, GFX 50S

Pulling high-ISO GFX 50x images in LrC

January 1, 2022 JimK 7 Comments

I have long recommended not using the GFX 50x ISO settings above ISO 1600 unless necessary to get adequate finder and preview image brightness.  Yesterday, I reported on pushing files exposed at ISO 1600 by three stops in Lightroom Classic (LrC) and compared the results to files exposed at ISO 12800. There were white balance… [Read More]

GFX 50S

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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

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

Archives

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