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You are here: Home / 2022 / Archives for July 2022

Archives for July 2022

Lightroom sharpening of Leica Q2 Monochrom files

July 23, 2022 JimK 1 Comment

I received a request to look at how Lightroom sharpens the Leica Q2 Monochrom (Q2M) files. Before I get into the graphs and numbers, I need to point out that there are three kinds of sharpening: Input, or capture sharpening Artistic sharpening Output sharpening The first has as its objective to get the file sharpness… [Read More]

Leica Q2 Monochrom

Gelling the light source for better balance in B&W scanning

July 17, 2022 JimK Leave a Comment

With light sources anywhere near D50, when scanning B&W negatives or positives, the green raw channels saturates well before the red and blue ones. It occurred to me that gelling the light source might even this out, and give me a higher SNR in the scans. I ordered a Rosco Minus Green #247 gel filter… [Read More]

The Last Word

July 2022
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Articles

  • About
    • Patents and papers about color
    • Who am I?
  • Good 35-70 MF lens
  • How to…
    • Backing up photographic images
    • How to change email providers
  • 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 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

  • JimK on Manually focusing the Fujifilm GFX 50S
  • John S on Manually focusing the Fujifilm GFX 50S
  • JimK on Scanning black-and-white negatives with a GFX 100S
  • Alessandro A on Scanning black-and-white negatives with a GFX 100S
  • JimK on Scanning black-and-white negatives with a GFX 100S
  • Alessandro A on Scanning black-and-white negatives with a GFX 100S
  • Parallax Enjoyer on Magical lenses?
  • JimK on Nikon Z7 focus shift shooting
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  • Gregory Summers on Nikon Z7 focus shift shooting

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