Vibration Reduction; I learned something today.

Discussion in 'Open Discussion' started by oldracer, Jan 22, 2016.

  1. oldracer

    oldracer Mu-43 All-Pro

    Oct 1, 2010
    USA
    I have posted at least a couple of times here saying that good testing of VR systems would require a standard shaker table programmed with waveforms developed by having a large number of photographers shoot with instrumented cameras. I then further opined that this would be prohibitively expensive and, hence, manufacturer claims for their systems could not be compared or trusted.

    Well, much to my surprise the Japanese "Camera & Imaging Products Association" (CIPA) has done exactly that! Shaker table, test data, .. the whole deal. Check out CIPA DC-011 Measurement and Description Method for Image Stabilization Performance of Digital Cameras: Home. Quite impressive, actually.

    The specs are long and tedious, so I do not claim to have read them in detail. One factoid jumped out, though:

    "Camera shake has components in six directions (yaw, pitch, roll, x, y, z) in total. However when the shooting distance is about 20 times the focal length, yaw and pitch are dominent, and the other directions can be practically negligible. Accordingly the waveform with only two-axis components is adopted. [for the testing protocol]"

    So my takeway is to watch to see whether manufacturer claims and data are based on the CIPA tests and to be skeptical about the value of some of the more complicated VR schemes out there.
     
    • Agree Agree x 1
  2. heli-mech

    heli-mech Mu-43 Top Veteran

    959
    Mar 9, 2012
    Vancouver Island, Canada
    Andrew
    Pretty sure Olympus already tests to this, for instance this is from the E-M10 mkii product page:

    Stabilization performance

    4.0 EV steps*
    *Based on CIPA measurement conditions.
    When using M.Zuiko Digital ED 14-42mm F3.5-6.3 EZ (focal length =42mm (35mm equivalent with 84mm))​