----- Original Message -----
From: "Carlos J. Santisteban"
> The Tamron 180/2.5 does have visible CA, axial type -- I have seen it with
> film. However, I believe it's a common issue with Internal Focusing
> lenses.
>
Not with the DZ50-200, it is also a IF lens and a zoom too.
>
> Yes, that's in the case of axial CA, which with
> this target makes the thin black letters look blue-purple. But some
> lenses also exhibit transverse CA (lateral colour), which remains
> about the same no
> matter the aperture.
>
> For instance, in <
> http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=481&Camera=453&Sample=0&FLIComp=0&APIComp=0&LensComp=0&CameraComp=0&SampleComp=0&FLI=0&API=9
>>
>
> if you look at the hollow square at the bottom right, you'll notice that
> even at f/16 there's some CA (lateral colour) present, although purple
> fringing was gone long ago.
>
This time I would say I can't 'see' it, it is just too small a problem for
me. The kind of CA is just one or two pixels spread, much less a problem in
real life when comparing with color fringe.
C.H.Ling
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|