• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Forums > Back > next PZ lens test report: Sigma AF 50mm f/1.4 EX HSM DG (full format)
Klaus
Super Moderator
******
Joined: Apr 2010
Posts: 8,103

Reputation: 49
#11
06-03-2010, 09:02 PM
[quote name='Rainer' date='03 June 2010 - 09:55 PM' timestamp='1275598508' post='156']

Can you "deabbreviate" this for me?

[/quote]



"Residual spherical aberrations" - the lens suffers from focus shifts when stopping down.

The focus information is obtained at max. aperture so it's slightly off at other settings. At close focus distances this is a relevant problem.



RSAs are not so uncommon in this class.
  Reply


Messages In This Thread
next PZ lens test report: Sigma AF 50mm f/1.4 EX HSM DG (full format) - by Klaus - 06-03-2010, 09:02 PM

Forum Jump:


Users browsing this thread: 20 Guest(s)