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the last word

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

You are here: Home / Archives for GFX 50S

Fuji 120/4 macro focus shift and LoCA

April 9, 2017 JimK 3 Comments

This is the 28th in a series of posts on the Fujifilm GFX-50S. The series starts here. A while back, I developed a protocol for measuring focus shift and longitudinal chromatic aberration (LoCA). I’ve improved it over the last year or so, but it’s still the same idea, as described here: Towards a macro MTF… [Read More]

GFX 50S, The Last Word

Fuji GFX read noise vs shutter speed

April 7, 2017 JimK 1 Comment

This is the 27th in a series of posts on the Fujifilm GFX-50S. The series starts here. I made a series of dark-field exposures with the GFX at ISO 1000 with LENR turned off. The shutter speeds were in third-stop increments from 1/4000 second to 30 seconds. The GFX will make longer timed exposures, and I… [Read More]

GFX 50S, The Last Word

Making lemonade from the GFX slow electronic shutter

April 6, 2017 JimK 6 Comments

It occurred to me that the 1/4 second transit time of the GFX could be put to use.

GFX 50S, The Last Word

Fujifilm GFX PC AutoSave not yet available

April 6, 2017 JimK Leave a Comment

In the WiFi setup menus of the GFX-50S, it offers you the opportunity to connect to a PC. However, when you go to download the “catcher” app from the Fuji web site, this is what you see:   I’m hoping that the folks at Fujifilm are working on it.

GFX 50S, The Last Word

Fujifilm GFX read noise and EDR

April 5, 2017 JimK 6 Comments

This is the 27th in a series of posts on the Fujifilm GFX-50S. The series starts here. This test almost didn’t get completed today. I had a big fight with RawDigger, and it won. Alex is helping me figure out what’s wrong, but in the meantime I ran it on another computer, where it worked… [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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