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the last word

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

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More on adapters

December 26, 2013 JimK 1 Comment

As I mentioned here, I’ve quite a stable of lens adapters. They all came in boxes that are too big for me to use in a storage cabinet, let alone a camera bag. They’ve been sitting in a pile in a Sterilite bin. When I change a lens on a digital camera, I have a… [Read More]

The Last Word

The dog that didn’t bark

December 25, 2013 JimK 1 Comment

There’s a Sherlock Holmes story that turns on something that didn’t happen. Hold that thought. Last night, at the request of the celebrating priest, I photographed a Christmas Eve service. Not wanting to be intrusive, I left the big lenses at home and packed light: D4, 14mm f/2.8, 70-200 f/2.8, tripod, cube head. I thought… [Read More]

The Last Word

On adapters

December 24, 2013 JimK 1 Comment

I have a ragtag collection of Nikon F-mount to Leica M-mount, Nikon F-mount to Sony E-mount, and M-mount to E-mount adapters from Novoflex, Metabones, and MTF. None of these are inexpensive; all cost over $200, and one cost more than twice that. As has been discussed before, none are the correct length, almost certainly on… [Read More]

The Last Word

M240 & a7R corner sharpness

December 23, 2013 JimK Leave a Comment

There have been repeated assertions on some photography fora that the a7R is deficient in corner sharpness. These statements go beyond the situations where corner smear develops because of ray angles that deviate significantly from orthoganality (what you get with many Leica M-mount lenses), and say that the a7R is soft in the corners in… [Read More]

The Last Word

Sony 55 FE on the a7R

December 22, 2013 JimK 3 Comments

The Sony/ Zeiss 55mm f/1.8 Sonnar is the first native FE (Full frame E) I’ve tried on the a7R. This is not a particularly small lens, but it’s very light, and makes for a happy shoulder when mounted to the a7R body. The first thing I did was check for falloff and color shift, with… [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
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  • 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
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      • MFT
      • APS-C
      • Full frame
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    • Test instructions — postproduction
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    • 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

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