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the last word

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

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Archives for 2022

Nikon Z9 testing started

January 26, 2022 JimK Leave a Comment

This is the first in a series of posts on the Nikon Z9. You should be able to find all the posts about that camera in the Category List on the right sidebar, below the Articles widget. There’s a drop-down menu there that you can use to get to all the posts in this series;… [Read More]

Z9

Are you completely satisfied with your gear?

January 24, 2022 JimK 9 Comments

There was a thread on DPR’s Medium Format board (full disclosure: I’m a moderator there) that started out the way a lot of threads there do. An MF-curious poster said that he was using FF gear and wondered what buying an MF camera would do for him. I asked what he didn’t like about his… [Read More]

The Last Word

More on Nikon Z7 EFCS exposure variation

January 15, 2022 JimK 2 Comments

In the previous post, I looked at how the electronic first-curtain shutter (EFCS) in the Nikon Z7 caused exposure differences from the top to the bottom of the frame. A reader pointed out that the optimum electronic first curtain timing depends on the lens exit pupil. I don’t have a lot of lenses that I… [Read More]

Nikon Z6/7

Nikon Z7 scan time and exposure variation in EFCS and MS

January 14, 2022 JimK 3 Comments

I’ve done a lot of work on the way that electronic first curtain shutter (EFCS) works on the Sony a7x cameras, but I never did much with the EFCS in the Nikon Z-series cameras, except to measure how well the did at reducing vibration and the associated image sharpness. The reason was that I somehow… [Read More]

Nikon Z6/7

Nikon D5 and Z7 sensitivity

January 13, 2022 JimK Leave a Comment

Over on DPR, when I was talking about the noise tests on the D5 and Z7 that I posted the day before yesterday, I remarked that the camera sensitivities appeared to be different, referencing a study I did on the Z5, a7RIII, and D850 some time ago. In that post, I found the D5 to… [Read More]

Nikon Z6/7

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May 2025
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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

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

Archives

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