Sigma 120-400 OS users

Started Oct 12, 2012 | Discussions thread
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Sigma 120-400 OS users
Oct 12, 2012

Few questions :

  • Have you noticed maybe bluring with speeds over 1/500 because of OS ? (There are stories supoorted even by Thom Hogan about VR causing such issues @ speeds faster than 1/500 )
  • Which OS mode is for panning ? 1 or 2 ? (is mabe "1" equivalent to VR "Normal" and "2" to VR"Active"?)
  • Is 400 the actual measured length @ 400mm ? (or maybe smth like 380mm ?)
  • Which F is the optimum for this lens across the focal range? F8 ? 
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