• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Forums > Back > next PZ lens test report: Canon EF 24-70mm f/4 USM L IS
mst
Moderator
*****
Joined: Apr 2010
Posts: 2,441

Reputation: 19
#12
03-04-2013, 05:20 PM
Quote:Why would changing a physical aperture on a lens change the point of focus? Does anyone know the mechanism for this?
http://toothwalker.org/optics/spherical.html

-- Markus
Editor
opticallimits.com
  Website
  Reply


Messages In This Thread
next PZ lens test report: Canon EF 24-70mm f/4 USM L IS - by HarryLally - 03-04-2013, 04:18 PM
next PZ lens test report: Canon EF 24-70mm f/4 USM L IS - by mst - 03-04-2013, 05:20 PM
next PZ lens test report: Canon EF 24-70mm f/4 USM L IS - by HarryLally - 03-04-2013, 06:46 PM
next PZ lens test report: Canon EF 24-70mm f/4 USM L IS - by kirbysdl - 03-04-2013, 11:09 PM

Forum Jump:


Users browsing this thread: 7 Guest(s)