the last word

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

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Archives for 2022

Coming attraction

December 29, 2022 JimK 2 Comments

Hasselblad has shipped me a 90 mm f/2.5 XCD lens for evaluation with my X2D 100C. I don’t normally test gear I don’t own — in fact, I’ve only done it once before, with a Kolari-modded camera. But the 90/2.5 is currently unavailable to consumers, and I’ve been interested in the lens since it was… [Read More]

X2D

Hasselblad 38/2.5 XCD on X2D, LoCA, natural scene

December 13, 2022 JimK 2 Comments

This is the 40th in a series of posts on the Hasselblad X2D 100C camera and the XCD lenses. You will be able to find all the posts in this series by looking at the righthand column on this page and finding the Category “X2D”. I was asked recently to show how much longitudinal chromatic… [Read More]

X2D

Using the Swebo TC-1 with more bellows extension

December 10, 2022 JimK Leave a Comment

The Swebo TC-1 is a nice piece of kit, but the rail and bellows only accommodate about 190 mm of flange focal distance. I can focus the Digaron HR 180mm lens from infinity to a few meters, but I can’t use longer lenses even at infinity, and I can’t get the bellows draw necessary for… [Read More]

The Last Word

First real picture with the Swebo TC-1

November 30, 2022 JimK 4 Comments

720nm IR-modded GFX 50R on the back of a Swebo TC-1, Rodenstock 180mm f/5.6 HR Digaron on the front of the TC-1, a 950 nm filter on the front of the lens. Edge burned for aesthetic reasons; the lens covers the sensor perfectly, as far as I can tell.

The Last Word

First light with the Swebo TC-1

November 28, 2022 JimK Leave a Comment

It’s not a very exciting picture, but it’s the first one I made with the Swebo TC-1. On the front of the tech cam was a Rodenstock 180mm f/5.6 HR Digaron. On the back was a Fujifilm GFX 100S. Some notes: The bellows and the monorail are long enough to allow the lens to focus… [Read More]

GFX 100S

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Articles

  • About
    • Patents and papers about color
    • Who am I?
  • Good 35-70 MF lens
  • 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

  • Brian Olson on Fuji GFX 100S exposure strategy, M and A modes
  • JimK on Picking a macro lens
  • JimK on Picking a macro lens
  • Glenn Whorrall on Picking a macro lens
  • JimK on What pitch do you need to scan 6×6 TMax 100?
  • Hatzipavlis Peter on What pitch do you need to scan 6×6 TMax 100?
  • JeyB on Internal focusing 100ish macro lenses
  • JimK on How focus-bracketing systems work
  • Garry George on How focus-bracketing systems work
  • Rhonald on Format size and image quality

Archives

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Unless otherwise noted, all images copyright Jim Kasson.