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the last word

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

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NEX adapters that are the right length

February 25, 2015 JimK 4 Comments

A year or so ago, I wrote this post complaining that lens adapters were always too short. Then, in this post, I reported that, at least in the case of Novaflex, they were too short by design. A week or so ago, in this post, I told you all that I had received two adapters… [Read More]

The Last Word

How much do you do in post?

February 24, 2015 JimK Leave a Comment

I made infrared tree exposures Saturday and Sunday, and spent most of yesterday stitching and editing the images. In photography, there are two extreme views of post processing. The first is that it’s all over when you release the shutter. Get that right and you don’t have to do anything else. In the film era,… [Read More]

The Last Word

Does using live view make your images noisier?

February 23, 2015 JimK 7 Comments

It has been speculated that using live view, because it heats up the sensor, will add to the shadow noise in images, and should be avoided. An extreme twist on this point of view says that you shouldn’t use mirrorless cameras because, with the exception of the M240, their live view is on all the… [Read More]

The Last Word

Learning on the job

February 22, 2015 JimK 1 Comment

No Battle Plan Survives Contact With the Enemy Thus spoke German military strategist Helmuth von Moltk. He was apparently right about war. The obvious corollary certainly applies to photography. And thus it is with my infrared trees series. Let’s start with lenses. I started out with the LifePixel-modified Sony alpha 7, the Coastal Optical 60mm f/4,… [Read More]

The Last Word

Screen resolution for print simulation

February 21, 2015 JimK 1 Comment

We saw a couple of days ago that viewing 36MP images on-screen at 2:1 exposed flaws that were invisible in 19×12.67 inch prints from an Epson 4900 on Exhibition Fiber paper, even upon close inspection with reading glasses, but not with a loupe. I need to add one more specification into the mix: the monitor… [Read More]

The Last Word

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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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  • Štěpán Kaňa on How Sensor Noise Scales with Exposure Time
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Unless otherwise noted, all images copyright Jim Kasson.