the last word

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

  • site home
  • blog home
  • galleries
  • contact
  • underwater
  • the bleeding edge
You are here: Home / The Last Word / Controlling for shutter slap

Controlling for shutter slap

December 20, 2013 By JimK 2 Comments

There have been recent reports of possible shutter-induced blur with tripod-mounted a7R/50mm lens combinations at speeds as fast as 1/160 second. I’ll be testing for this later, but I’d like to assure you that that hasn’t affected the aperture series that I’ve presented so far in this set of posts.

Mindful of possible shutter-slap effects, my practice in this review has been to start a four-stop series at 1/4000 second for the widest aperture, which means that the smallest aperture will get 1/500. For a five-stop or longer series, I start at 1/8000.

I also use the self-timer to trip the shutter, which seems a little silly, but you can’t be too careful.

← Coastal 60mm, Leica 50mm on a7R — right side Leica WATE on the Sony a7R →

Comments

  1. Ferrell McCollough says

    December 20, 2013 at 7:32 pm

    I did some shutter vibration tests using the iseismometer app on the A7R. I compared the A7R, D3 and NEX-7. The output is sensitive in XYZ axes.
    Thank you for all your testing, excellent work you’re doing!

    http://beforethecoffee.com/sony-a7r-vibration-comparison-with-nikon-d3-and-sony-nex-7/

    Reply
  2. Jim says

    December 20, 2013 at 8:31 pm

    Ferrell, you’ve done some great work here. As it turns out, your comment reached me after I had written a set of musings on shutter slap testing today. I’ll think about what you’ve done, possibly modify it based on your insights, and post it tomorrow.

    Jim

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

April 2021
S M T W T F S
 123
45678910
11121314151617
18192021222324
252627282930  
« Mar    

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

  • JimK on Relative sensitivity of Sony a7RIV and GFX 100S
  • CarVac on Relative sensitivity of Sony a7RIV and GFX 100S
  • JimK on Relative sensitivity of Sony a7RIV and GFX 100S
  • Ilya Zakharevich on Pixel shift with the Fujifilm GFX 100S
  • Ilya Zakharevich on Relative sensitivity of Sony a7RIV and GFX 100S
  • JimK on GFX 100S sensor is a 4-shot stitch
  • John Leathwick on GFX 100S sensor is a 4-shot stitch
  • Christer Almqvist on GFX 100S sensor is a 4-shot stitch
  • JimK on Three dimensionality and sensor format
  • Tom Hegeman on Three dimensionality and sensor format

Archives

Unless otherwise noted, all images copyright Jim Kasson.