That's not CA that's bloom, a characteristic of the sensor not the
lens. You will probably see it to a greater or lessor extent with any
lens on a digital sensor.
Joseph Tainter wrote:
Sorry to say, I have just seen my first chromatic aberration from this
lens. In Prague a couple of weeks ago, I photographed some gargoyles
on a cathedral. The scene was an individual gargoyle, shot at 210 mm.
and f5.6 (wide open). In the background are some gothic architectural
elements that are rendered out of focus, set against a lighter sky.
There is a purple halo around the OOF architectural elements. Since
the CA is in the center of the image area, ACR cannot fix it. Although
shot wide open, the gargoyle I was focusing on came out pleasingly sharp.
So now I am thinking again about the DA 50-200. But I believe I have
seen an image with CA from this lens, too -- a white license plate
rendered purplish. Again, it was in the center of the image.
Still, this is the first time that the SMC F 70-210 has failed me, and
this was a limited situation. So for now I will keep using it. I am
waiting to hear the details of Pentax's forthcoming D FA "high
performance telezoom."
I sure wish I could put my hands temporarily on a DA 50-200 to test it
systematically against the F 70-210.
Joe
--
When you're worried or in doubt,
Run in circles, (scream and shout).
- Re: F 70-210mm 4.0-5.6 P. J. Alling
-
