• 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 a7RIV

Calibrating out the camera when making color profiles

March 17, 2020 JimK 22 Comments

In this test and this one, I showed that you could get the colors of developed files from the Sony a7RIV, the Nikon Z7, and the Fujifilm GFX 100 reasonably close if you used Lumariver Profile Designer, and the reproduction style. The a7RIV and the Z7 were remarkably statistically accurate and even closer to each… [Read More]

a7RIV, GFX 100, Nikon Z6/7

Sony 20/1.8 vs Batis 18/2.8 — Siemens Star

March 14, 2020 JimK 2 Comments

I’ve been asked to compare the Sony 20mm f/1.8 to the Zeiss Batis 18 mm f/2.8. Here’s a test with both lenses mounted on an a7RIV aimed at a low-contrast Siemens Star at about 8 meters for the 20, and about a meter close for the 18, with the star in the center and the… [Read More]

a7RIV

Sony 20mm f/1.8 focus curvature

March 14, 2020 JimK 5 Comments

Roger Cicala has come up with a quick and dirty focus curvature test that I’ve used before.  Just make a photograph of a flat textured surface at an angle well away from the image field focus plane, then bring it into Photoshop and invoke Filter>Stylize>Find Edges. It works great at long and near-normal focal lengths:… [Read More]

a7RIV

Chromaticity shifts with the a7RIV, Z7, and GFX 100

March 13, 2020 JimK Leave a Comment

Yesterday, I reported on test shots of both the Macbeth Colorchecker 24-patch target (the CC24), and the Colorchecker SG 140-patch target (CCSG), made with the following setup: Sony a7RIV, Nikon Z7, Fujifilm GFX 100 Zony 55, Nikon 24-70/2.8 Z-mount lens, Fuji 120 mm f/4 macro Godox/Flashpoint AD600 Pro strobes, set to 1/64 power. 12-inch reflectors… [Read More]

a7RIV, GFX 100, Nikon Z6/7

Camera differences in color profile making

March 12, 2020 JimK 16 Comments

I made test shots of both the Macbeth Colorchecker 24-patch target (the CC24), and the Colorchecker SG 140-patch target (CCSG). I used the following setup: Sony a7RIV, Nikon Z7, Fujifilm GFX 100 Zony 55, Nikon 24-70/2.8 Z-mount lens, Fuji 120 mm f/4 macro Godox/Flashpoint AD600 Pro strobes, set to 1/64 power. 12-inch reflectors 45-degree strobe… [Read More]

a7RIV, GFX 100, Nikon Z6/7

  • « Previous Page
  • 1
  • 2
  • 3
  • 4
  • 5
  • …
  • 14
  • 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 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
  • Ivo de Man on Fuji 20-35/4 landscape field curvature at 23mm vs 23/4 GF

Archives

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

Unless otherwise noted, all images copyright Jim Kasson.