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the last word

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

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Archives for 2015

Normal lenses on the D810 at f/5.6

March 17, 2015 JimK Leave a Comment

Yesterday, we looked at the performance of the following lenses: Nikon 60mm f/2.8 AF Micro-Nikkor Nikon 58mm f/1.4 AFS-Nikkor G Coastal Optical 60mm f/4 UV-Vis-IR Apo Macro Sigma 50mm f/1.4 DG Art (Copy 1) Sigma 50mm f/1.4 DG Art (Copy 2) Zeiss 55mm f/1.4 Otus when aimed at a distant landscape at f/4, the widest… [Read More]

The Last Word

A bunch of nearly normal lenses

March 16, 2015 JimK 2 Comments

I had some fun with the medium telephoto shootout last week, and I hope you did, too. I thought I’d do the same with some longish normal lenses. The, ahem, normal, definition of a normal lens is a lens whose focal length is equal to the diagonal of the film format. By that definition, the… [Read More]

The Last Word

Yesterday’s oak tree images

March 16, 2015 JimK 2 Comments

Here are a few images from yesterday. The top one is my favorite. I like the rectilinear mapping. It’s not often I can use it because my usual total stitched image field is too wide. Maybe I’ll experiment with a longer lens — these were all with a 60 — to narrow the field of… [Read More]

The Last Word

Wednesday’s oak trees

March 15, 2015 JimK Leave a Comment

i struggled with the oak trees on Wednesday. I’m not sure why; the weather was perfect for what I’m doing. A weak storm ended, and I was out to catch the clearing sky. I hit it perfectly. That was it. Two keepers. I think this could be a good image if I could master the… [Read More]

The Last Word

What’s important in photography?

March 14, 2015 JimK 15 Comments

I just dashed this off, and I’ll probably think of more things as soon as I post it, but I want to get it up. Feel free to add things as comments. The following was cited recently on dpr as a list of the important things for good photography: Composition Quality of light Proper exposure… [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
  • JimK on Calculating reach for wildlife photography
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  • JimK on Calculating reach for wildlife photography
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  • Javier Sanchez on The 16-Bit Fallacy: Why More Isn’t Always Better in Medium Format Cameras
  • Mike MacDonald on Your photograph looks like a painting?
  • Mike MacDonald on Your photograph looks like a painting?

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Unless otherwise noted, all images copyright Jim Kasson.