- Original Message -
From: Peter Alling
Subject: Re[2]: An Autofocus Automatic Lens Question
Are you sure about that? On my SMCP-M SMCP-(K) and SMCT
lenses
the only different colored f setting is the hyper focal stop
with
the same color, (orange), marking the hyper focal distance
On Tuesday, March 5, 2002, at 12:40 PM, William Robb wrote:
All lenses, and all f/stops on those lenses have a hyperfocal
distance
Yes, but Peter is speaking of the red f8 on Pentax wide angle lenses
-Aaron
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I've always thought of this as a classic example of pointless
automation On the older series of prime lenses the optimal aperture
was marked in a different colour from the others In conjunction with
the depth-of-field scale on the lens this did everything that the MTF
programme does, and all it
H'lo Bob,
I experimented with those modes for awhile after I bought the
PZ-1p, just to see how they worked. They do work as described
in the manual but, I haven't used them since. They are not
really needed if a guy has a bit of knowledge. They would be
pretty good for a beginner to use
Are you sure about that? On my SMCP-M SMCP-(K) and SMCT lenses
the only different colored f setting is the hyper focal stop with
the same color, (orange), marking the hyper focal distance. This is
only on the Wide Angle lenses;.
At 06:51 AM 3/4/2002 +, you wrote:
Hi,
I've always thought
Hi,
every f-stop has a hyperfocal distance. The reason why one of them,
generally f/8, is marked differently from say f/11 or f/16, both of
which will of course give you greater depth-of-field and are therefore
better from the hyperfocal point-of-view, is that f/8 is the optimal
aperture from
Hi,
Shel, Bob...the depth of field scale does not indicate the lens'
sharpest aperture; it merely tells you hyperfocal info. The MTF program
does NOT use hyperfocus, it uses the lens' sharpest apertures whenever
possible. For instance, if a given lens was okay at f2, good at f4,
Hi,
it's your prerogative, of course. But consider a reply I had privately
to this:
Also, by the time you're done fiddling with the various function
adjustments to get the camera to work automatically, you could have set
everything manually and taken the picture.
It might be instructive to
Hi,
distance. It is also why the phrase 'f/8 and be there' specifies f/8
rather than f/64 or whatever. If it was just about getting as much in
focus as possible they'd all do it with the smallest aperture.
but what about a decent shutter speed then ?
...they'd all do it with the smallest
Hi,
It might be instructive to compare the times taken by sufficiently
competent photographers to use the different methods, and the
ergonomics human energy requirements of each one.
Thats an implementation issue. Is the *idea* by itself bad ?
Implementation is everything in this case.
The MZ-S has the same, the program mode can be set to greatest DOF,
MTF or fastest shutter speed.
Bruce Dayton
Sunday, March 03, 2002, 5:49:07 PM, you wrote:
LP Yes. The PZ-1p has an MTF mode that reads the chip info in an
LP FA (and maybe an F) lens and uses the best aperture. It has
LP
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