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the last word

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

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Archives for 2020

Nikon 70-200/2.8S vs 70-200/2.8E light falloff

October 3, 2020 JimK 1 Comment

This is the second in a series of posts about the Nikon 70-200 mm f/2.8 S lens for Nikon Z cameras. The series starts here. In the screening test I posted earlier today, the 70-200/2.8S showed significant light falloff wide open in the corners at 200 mm. I’ve received a couple of requests to compare… [Read More]

Nikon Z6/7

Nikon 70-200/2.8S screening test

October 3, 2020 JimK 1 Comment

I received the Nikon 70-200mm f/2.8 S lens for Zx cameras yesterday. First impressions: About the same size as the 70-200mm f/2.8E, but noticeably lighter. The traditional slide switches on the barrel are MIA, and their function is handled by menu selections in the camera; I don’t think this is a good move. Has the… [Read More]

Nikon Z6/7

Why so few posts?

September 4, 2020 JimK 21 Comments

I’ve received a few messages asking why I haven’t posted in a while and am I all right? I am fine, but have had a scare, as you’ll see if you read on. My rate of posting slowed down at about the time the Covid-19 epidemic started to hit the US hard. That was driven… [Read More]

The Last Word

Sharpness is overrated

July 31, 2020 JimK 11 Comments

From a recent DPR post:  I view every GFX file at 1:1 and if it is not sharp, it gets instantly deleted. Fealty to the God of Sharpness is getting out of hand. Not that there’s anything wrong with a sharp image, if sharpness is what’s needed to make the image a success. But sharpness… [Read More]

The Last Word

Fuji 30/3.5, 32-64/4 on GFX 50x, foliage

July 26, 2020 JimK Leave a Comment

This is a continuation of a series of tests on the new Fujifilm 30mm f/3.5 G-mount lens. Today I’m comparing it with the Fuji 32-64 mm f/4 zoom. I did this earlier with a Siemens Star target, which is unforgiving; it was designed to be so. What if we just aim the camera at some… [Read More]

GFX 100, GFX 50S

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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

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