• site home
  • blog home
  • galleries
  • contact
  • underwater
  • the bleeding edge

the last word

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

You are here: Home / Archives for 2019

Archives for 2019

Nikon Z6, Z7 FWC and read noise

April 4, 2019 JimK 12 Comments

This is one in a series of posts on the Nikon Z6 and Z7. 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… [Read More]

Nikon Z6/7

Speculating on the GFX 100S shadow noise performance

April 2, 2019 JimK 8 Comments

Bill Claff has recently posted photon transfer curves and input-referred read noise curves for the Phase One IQ4 150MP camera on his excellent web site. This camera uses the Sony IMX 411 sensor that Sony began shipping last year. Presumably, the announced-but-not-yet-shipping Fujifilm  GFX 100S will use the IMX 461 sensor that Sony also began… [Read More]

Nikon Z6/7

Stacked sensors and autofocus

March 26, 2019 JimK 20 Comments

Almost all my technical posts are based on research and testing. This one is different: it is entirely speculation. Yesterday I upgraded the firmware on my Sony a9 to version 5.0, which had just been made available for download by Sony. It is much more than any other Sony firmware release that I’ve ever seen…. [Read More]

a9

Lap times as lab testing

March 22, 2019 JimK 1 Comment

This is a continuation of a discussion that starts here. I have pointed out lap time testing as an example of one of the things that’s analogous to some kinds of lab tests when doing camera testing. Lap time testing is a more complicated case than car tests like 0-60, 0-100-0, stopping distance, or even… [Read More]

The Last Word

Tales of a misspent youth

March 21, 2019 JimK 3 Comments

I’ve got more to say about the camera/car testing analogy, but I just saw this post today on DPR. Maybe I’m in my dottage, but it took me back to my days as a high-school newspaper photographer. I worked in a shared darkroom, with collective responsibility for keeping the communal chemicals fresh, replenished, and properly… [Read More]

The Last Word

  • « Previous Page
  • 1
  • …
  • 36
  • 37
  • 38
  • 39
  • 40
  • …
  • 43
  • Next Page »
May 2025
S M T W T F S
 123
45678910
11121314151617
18192021222324
25262728293031
« Apr    

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

  • JimK on How Sensor Noise Scales with Exposure Time
  • Štěpán Kaňa on Calculating reach for wildlife photography
  • Štěpán Kaňa on How Sensor Noise Scales with Exposure Time
  • JimK on Calculating reach for wildlife photography
  • Geofrey on Calculating reach for wildlife photography
  • JimK on Calculating reach for wildlife photography
  • Geofrey on Calculating reach for wildlife photography
  • 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?

Archives

Copyright © 2025 · Daily Dish Pro On Genesis Framework · WordPress · Log in

Unless otherwise noted, all images copyright Jim Kasson.