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You are here: Home / 2019 / April / Archives for 23rd

Archives for April 23, 2019

Optimizing aperture and focus distance, an example

April 23, 2019 By JimK 4 Comments

This is a continuation of a series of posts about blur management for landscape photography. The series starts here. In the last post, I showed you the results of a blur management optimizer that I wrote this morning. Now I’m going to try it out on an outdoor scene. You’ll recognize it; it’s one I… [Read More]

Optimizing f-stops and focus distance for landscapes

April 23, 2019 By JimK 22 Comments

This is a continuation of a series of posts about blur management for landscape photography. The series starts here. Here’s a situation in which many landscape photographers often find themselves: There are important objects at various distances from the camera. There is too much subject motion to be able to use focus stacking or stitching… [Read More]

Choosing f-stops and focus distance for landscapes

April 23, 2019 By JimK 12 Comments

This is the first post in a series. You can find links to all the others by scrolling down to the bottom of the page — below the comments — and looking at the pingbacks. Almost two years ago, I created a long series of posts looking at depth of field (DOF) using modulation transfer… [Read More]

April 2019
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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
  • 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 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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Archives

Unless otherwise noted, all images copyright Jim Kasson.