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

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Archives for November 2021

Amp glow in Fujifilm GFX 50S Mark I and II

November 18, 2021 JimK 10 Comments

A reader saw something that looked like amp glow on dark-field photographs with his new GFX 50S II. I asked for raw files in the three mains shutter modes: mechanical shutter (MS), electronic first-curtain shutter (EFCS), and electronic shutter (ES). At my request, the exposures were made at ISO 1600 at 1/10 second. I had… [Read More]

GFX 50S

GFX 100S scanned images at 100%

November 13, 2021 JimK Leave a Comment

I’ve received a request for crops at 100% magnification of some of the images that I showed you in the last post. Here they are, together with the whole frames. Note that the JPEG compression used on this site will obscure details.                      

GFX 100S

Some scans with the GFX 100S

November 12, 2021 JimK 3 Comments

In the last post, I walked you through my new system for digitizing silver negatives. In this post I’ll show you some scans. These are all from a series I did in the late 80s in the hills above Stanford University. The idea of the series was to explore the relationship of nature and technology… [Read More]

GFX 100S

Scanning black-and-white negatives with a GFX 100S

November 11, 2021 JimK 21 Comments

I haven’t posted here in a almost three weeks. That’s a long time for me. There’s a reason for that; I’ve been doing some actual photography. This is a post about what I’m doing, concentrating on how I’m doing it. Most of my posts the past few months have been, uh, focused on testing macro… [Read More]

GFX 100, GFX 100S

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November 2021
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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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Archives

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