If this information is correct, it might seem like Pentax have problems with
implementing exact electronic control of Aperture. This can be a design
problem with the KAF2/FA mount, how the camera exchange aperture information
between lens and body. If so, Pentax decided to leave out electronically Av
mode in MZ-S due to problems with Z1p. However, I have never experienced any
problems with this.
Arnie
----- Original Message -----
From: "Alan Chan" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, July 10, 2001 11:17 PM
Subject: RE: My First Impressions on the MZ-S
> With all the discussion about the aperture rings, I think one important
> point is that if you set the aperture ring to 'A' and alter the aperture
> settings through the body (Z-1p in this case), the "actual" aperture might
> not be what you expected. For instance, I have checked all my Pentax
lenses
> on Z-1p (2 of them) and discovered the apertures set by the bodies were
> actually smaller (phyically) than when set the aperture rings directly
(even
> they both gave the same f value). And the worst of all, the magnitude is
> lens dependent. This could be very frustrating when shooting slides. For
> this reason, I have not given up the aperture rings even when I use the
> Z-1p. My test results are as follow:
>
> FA*24/2 ('A' is about 1/3 stops larger)
> FA43/1.9 ('A' is about 1/3 stops larger)
> FA77/1.8 ("A - 1.8" is not 100% wide open)
> FA100/2.8Macro ('A' is about 1/2 stops larger)
> F*300/4.5 ('A' is about 1/3 stops larger)
>
> regards,
> Alan Chan
>
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