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the last word

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

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Archives for October 2017

Sony 100-400 Siemens Star test

October 13, 2017 JimK 6 Comments

Today, after a long wait, I received an FE-mount Sony 100-400 f/4.5-5.6 GM OSS lens. I’ll be reporting on it for the next week or so. First thing I do these days when I get a new lens is run the Siemens Star test on it, in order to detect manufacturing errors. The test is… [Read More]

The Last Word

Guest post on GFX adapted lenses

October 13, 2017 JimK 11 Comments

This is the 74th in a series of posts on the Fujifilm GFX-50S. The series starts here.  When I was testing the GFX 50S, I did a lot of work with adapted lenses. I’ve received information about many  lenses that I did not test from a reader named Robert Jones. I think it’s sufficiently interesting… [Read More]

The Last Word

My photography in a nutshell

October 11, 2017 JimK Leave a Comment

I was recently invited to create the material for a page on the Center for Photographic Art website devoted to my work. One of the things they wanted was what they called an Artist’s Statement. I’d done those for particular bodies of work before, but this was different: a couple of hundred words that summed up… [Read More]

The Last Word

65/2 Apo-Lanthar 1:2 corner sharpness

October 10, 2017 JimK Leave a Comment

This is the eighth in a series of posts about the Voigtlander 65 mm f/2 Apo-Lanthar macro lens. The series starts here.  In this post, I showed 65 mm f/2 Apo-Lanthar center and corner performance at f/2 and at a 1:2 reproduction ratio. Unsurprisingly, the corners were slightly softer than the center. I have improved my… [Read More]

The Last Word

Sony a9 LCD lag

October 10, 2017 JimK 6 Comments

Yesterday, I did a test of the lag of the lag of the LCD panel on the back of the Sony a7RII. Today, I’ll do the same thing for the Sony a9, and add some notes about the EVFs on the two cameras. Here’s a picture that pretty much says it all:   This is… [Read More]

a9

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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

  • JimK on Sony 135 STF on GFX-50R, bokeh visuals
  • Manu on Sony 135 STF on GFX-50R, bokeh visuals
  • John Griffin on The 16-Bit Fallacy: Why More Isn’t Always Better in Medium Format Cameras
  • 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

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