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the last word

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

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Sigma ART 24/1.4 on Fujifilm GFX 50S

April 26, 2017 JimK 3 Comments

This is the 48th in a series of posts on the Fujifilm GFX-50S. The series starts here. I still don’t have a lot of wide options for the GFX. The HC 35 works pretty well, but it’s a big, heavy thing. I thought I’d try the Sigma ART 24 mm f/1.4. All images were refocused at… [Read More]

GFX 50S, The Last Word

Sigma ART 50/1.4 on Fujifilm GFX 50S

April 25, 2017 JimK 3 Comments

This is the 47th in a series of posts on the Fujifilm GFX-50S. The series starts here. I’m starting to get to the end of the GFX testing, at least for now. I have Leica M, Hasselblad V, and Leica R adapters on order, and I’ll do some testing with lenses from those families when… [Read More]

GFX 50S, The Last Word

Fuji 120/4 Macro at 1:2 on GFX: LoCA and focus shift

April 25, 2017 JimK 1 Comment

This is the 46th in a series of posts on the Fujifilm GFX-50S. The series starts here. I’ve been asked to run the same focus shift and longitudinal chromatic aberration (LoCA) tests that I did at 1 meter on the Fuji 120 mm f/4 macro lens for the Fujifilm GFX 50S, but at a closer… [Read More]

GFX 50S, The Last Word

Mitigating lighting banding in GFX ES images

April 24, 2017 JimK 6 Comments

This is the 45th in a series of posts on the Fujifilm GFX-50S. The series starts here. The GFX offers an all-electronic shutter, which Fuji calls ES in the menus. I’ll do the same here. We have seen here that the shutter takes 1/4 second to complete an exposure. This can cause horizontal bands (in landscape… [Read More]

GFX 50S

Fujifilm GFX 50S shooting experience

April 23, 2017 JimK 6 Comments

This is the 44th in a series of posts on the Fujifilm GFX-50S. The series starts here. After using the GFX for about a month, and having finished most of the technical testing that I’m going to be doing, it’s time to take stock of the experience of using the camera. The camera feels good… [Read More]

GFX 50S, The Last Word

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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

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

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