All Forum Comments
Comment by Algernon posted on Firefox 8 out at 10/11/2011 - 08:29
Bit of a pain
It would be useful to know if "apply all" gets overridden?
Comment by Algernon posted on AF microadjustment at 09/11/2011 - 18:02
OK you can leave the lens set at the working aperture i.e. f/5.6
or f/8 and still focus OK, because a lot of zooms are that aperture
anyway.
Try focusing a 28 to 50mm lens at f/5.6 visually and you will see
what I mean about DOF.... it looks in focus, but isn't when you
import the pic onto a PC.
Comment by Algernon posted on AF microadjustment at 09/11/2011 - 14:00
Sounds like a variation on the old chainpod to me.
The simple modern version is a retractable dog lead, either using the lead or replacing it with chain .
Comment by Algernon posted on SteadyEpod. at 09/11/2011 - 11:50
points where a target a meter away went in and out of focus so that
I could take an average of the two which would have been near enough
the correct point of focus. I used a focus rack that had +/- 30mm
adjustment, but it stayed in focus all the way according to the
10X image on the screen.... so I need something with +/- 100mm
adjustment.
The green hexagon on the other hand was sensitive to about +/- 3mm
Comment by Algernon posted on AF microadjustment at 09/11/2011 - 10:36
It's also faster and quieter focusing. Works well with the 1.7AF
Comment by Algernon posted on F* 300 f4.5 or DA * 300 f4? at 09/11/2011 - 10:09
focus.. it's not really in focus from a critical POV that is
By definition anything within the DOF looks in focus and you
can't argue with that.... so if I have a subject at say 10m and
and the DOF is from say 6.5m to 20m.... anything between
6.5m to 20m is going to look in focus... I might
actually be focused at 6.6m not 10m and I lose the
DOF behind the subject, because the true DOF is
now from about 5m to 10m
This partly shows what a lot of theoretical nonsense DOF tables
are You simply can't focus accurately enough for
them to be any use.
The green hexagon is incredibly accurate, I've tested it. The
problem is transferring that accuracy to the focus ring on the
lens.
LV Contrast AF is also accurate, but no use with MF lenses.
I'm really struggling with 28mm - 35mm f/3.5 lenses because
they have a big DOF, that's why I tend to use INF + f/8 and
leave it there. If I try to focus the object I focus on is
usually OOF... possibly my screen needs shimming.
Comment by Algernon posted on AF microadjustment at 09/11/2011 - 09:56
I wouldn't use it for wildlife though. It's really a job for
something longer.
Looks sharp enough on the cityscape, but I'm not a fan
of afternoon sunlight at this time of the year
Comment by Algernon posted on Getting to know my FA*28-70 f/2.8 at 09/11/2011 - 08:33
So.. going back to the lens that's back focusing more than the K-5 adjustment allows... what's best to do?
Comment by Algernon posted on AF microadjustment at 09/11/2011 - 08:16


versions. I went back to v3.6ish on one PC and I'm
on v2 on this one, because Fasterfox still runs on
it and shows things like how long a page is taking
to load etc. This page took 0.440secs
I hate change just for the sake of change.