06-06-2010, 03:39 PM
[quote name='johnwhit' date='06 June 2010 - 03:33 PM' timestamp='1275831195' post='271']
OK it seems a little quiet on here, so here I go with my first topic!
I've noticed in some lens tests the issue of residual spherical aberrations (focus shifts when stopping down). However I've never seen it mentioned in a Pentax lens review/test, is this something that the Pentax lenses are free from, or is it just the case that the issue was not mentioned?
Regards,
John
[/quote]
Don't bet on this. Many lenses show RSAs. The primary question is whether it's field relevant.
OK it seems a little quiet on here, so here I go with my first topic!
I've noticed in some lens tests the issue of residual spherical aberrations (focus shifts when stopping down). However I've never seen it mentioned in a Pentax lens review/test, is this something that the Pentax lenses are free from, or is it just the case that the issue was not mentioned?
Regards,
John
[/quote]
Don't bet on this. Many lenses show RSAs. The primary question is whether it's field relevant.