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

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Archives for April 2018

Sony A7III testing – and tribalism

April 24, 2018 JimK 20 Comments

I’ve said that I wasn’t going to test the Sony a7III. The testing I do takes a while, do I need to purchase cameras I test, and I don’t see much of a place for the a7III in my own photography since I already have an a9 and an a7RIII. But working with files that… [Read More]

a7III

Light painting with the GFX 50S — a demo

April 22, 2018 JimK 3 Comments

Yesterday I reported on using the Fuji GFX 50S  and the Fuji 120 mm f/4 macro for focus stacking. One of the images was of this lily:   Now I’m going to show you another thing I’ve been doing with the same subject, lens, and camera.  Here’s the setup: I’m using two lights for most… [Read More]

GFX 50S

Focus stacking with the GFX 50S — a demo

April 21, 2018 JimK 4 Comments

I wrote a post on the nuts and bolts of the poorly-named focus- bracketing feature that arrived with the current version of the GFX firmware.  Now I’ll give you a little demo. The setup: There’s a Fuji 120 mm f/4 macro on the camera. The lights are two Godox 600 TTL Pro strobes. I’m not… [Read More]

GFX 50S

Capture One and Fuji GFX 50S focus stacking

April 18, 2018 JimK 1 Comment

I received the following query from a reader: I wonder whether you can give me a hint how to tackle an issue I ran into. Quite some people are using Capture One with their GFX but I have not heard yet of anyone using focus stacking with the TIFFs coming out of Capture One.  I… [Read More]

GFX 50S

Sony a7III raw filtering

April 6, 2018 JimK 5 Comments

The a7III is about to ship in the US — it’s already in the wild elsewhere — and, although it is exceedingly attractively priced, I’m not expecting to be a customer. Nothing wrong with the camera, to my way of thinking, but I just don’t see the utility to someone who already has an a7RIII and… [Read More]

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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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Archives

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