Hi!
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.
I like your style of writing ;-)...
I have similar problems too. For example, I have Tamron 90/2.5 SP
Adaptall lens with Pentax K Adaptall 2 adapter. This adapter is
equivalent to KA mount...
The markings on the lens go from f/2.5 to f/32. On my *istD it goes from
f/2.4! to f/22... Do I care? Heck no! It measures properly and it
works properly...
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?
All I can suggest is that you shoot some film with your camera-lens
combination. I am fairly certain that except wrong displayed values, it
will be perfectly fine.
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.
I'd agree with you. But, unless I am mistaken that short tele lens
you're talking about is built in such a way that manual focusing with it
is very pleasant too...
Awaiting your photos!
Boris
