I don't know anything about the MZ-5n AF performance. All I can tell
you is that the *ist DS AF works pretty well with lenses from f/1.7
to f/5.6 maximum aperture: it's mostly pretty accurate under a wide
variety of conditions. Of course, critical focus in demanding
conditions I do best by myself ... just click the AF-MF switch and
turn it off.
Regards the aperture readout, I'm surprised it doesn't show f/1.8
rather than f/1.7 but it is most likely simply what the camera's
readout is approximating.
Godfrey
On Aug 5, 2005, at 3:53 PM, Shel Belinkoff wrote:
Today I received my first auto focus lens to be used on an auto focus
camera. The camera is the MZ-5n, which is on loan from a local list
member, and the lens is a Pentax short tele 1.8 aperture. When
using the
lens on the A setting it will sometimes show the aperture in the
viewfinder
as 1.7 ;-)) I didn't check to see if that's the case in aperture
priority
mode as well.
Anyway, does this mean that the actual aperture of the lens is a
bit wider
than 1.8, or that the way the software in the camera is set it just
reads
out an aperture that's closest to whatever it's programmed for, or
what?
Will other aperture settings be a little off as well?
Thus far, and apart from this little anomaly, I'm not too impressed
with
the way the auto focus focuses. It's clear that in a lot of
situations
(low contrast, low light, with certain textures or colors) the auto
focus
feature is pretty useless. I'd hate to see how it would perform with
slower lenses.
Shel
