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the last word

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

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Preparing for an exhibition

December 17, 2019 JimK 3 Comments

For the last month or so, I’ve been occupied in preparing for an upcoming exhibition. In this and a few subsequent posts, I’d like to walk you all through the process that has been ongoing for about nine months, and which will culminate in a show at a local museum in the first quarter of… [Read More]

The Last Word

How to test a new camera

December 6, 2019 JimK Leave a Comment

I received the following question: What are some good tests to do when receiving a new camera body? I just want to make sure it’s a good copy before my return date expires. I’d not thought much about that. I do days of testing when I get a new camera, but that testing is related… [Read More]

The Last Word

Roles of camera and raw developer in determining color

December 6, 2019 JimK 22 Comments

In the middle of a long discussion of the differences between the color information in raw files from the Sony a7RIII and a7RIV and whether there was a possibility of a firmware change (I said not, the person with whom I was conversing said yes) there was this statement: i think when people like me… [Read More]

The Last Word

a7RIV vs GFX 100 landscape IQ with GigaPixel AI — part 2

November 26, 2019 JimK 12 Comments

In the last post, I upsampled files from the Fujifilm 110 mm f/2 on the GFX 100 and the Zeiss Otus 85 mm f/1.4 on the a7RIV, using Topaz GigaPixel AI, with surprising results. I had concerns about possible under-the-hood sharpening differences with Lightroom, and also with Lightroom’s export resizing, so I decided to process… [Read More]

a7RIV, GFX 100

Sony a7RIV vs Fuji GFX 100 landscape IQ with GigaPixel AI

November 22, 2019 JimK 7 Comments

In the previous post, I looked at landscape images from the Fujifilm 110 mm f/2 on the GFX 100 and the Zeiss Otus 85 mm f/1.4 on the a7RIV. The crops were magnified to about 200% using Lightroom’s export feature. The Fuji images looked much better, even at f/11 on the Fuji lens and f/8… [Read More]

a7RIV, GFX 100

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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

  • Javier Sanchez on The 16-Bit Fallacy: Why More Isn’t Always Better in Medium Format Cameras
  • Mike MacDonald on Your photograph looks like a painting?
  • Mike MacDonald on Your photograph looks like a painting?
  • 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

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Unless otherwise noted, all images copyright Jim Kasson.