Hi Dave!

> "...troglodytes.."
>
Oh, sorry, not _you_ Dave! :-)

> "...target shooter since 1966..."
>
Hey, renew that NRA membership buddy! Oh, Life Member? Never mind! :-) And
1966? You could be older than _I_ am!?! I used to shoot target .22 in the
basement of the Winchester factory in New Haven in that same era, I think it
was called the Jack Lacy Winchester Shooting Team. I never won a
championship but my brother was state champ a few times...

> "...he mentioned on a number of occasions that his pictures
> were not in focus. Also complained about the shutter lag."
>
Lots of issues here, he should hang out at a C*n*n discussion forum and read
up.

The main shutter lag thing is of course to always "pre-focus" (silly name,
like you are going to shoot _before_ you focus?!?!), then when you press the
shutter all the way, Snap!, picture taken.

And while there seem to be a very small percentage of truly defectively
focusing cameras, there are many opportunities for user error or camera
ambiguity. Like when one of the edge sensors focuses on something that's
closer or farther than your subject and you don't notice. And it seems the
center sensor mark in the viewfinder is smaller than the sensor sees, so it
can focus on something outside the mark (that's closer or farther...) and
you don't notice.

There are plenty of focus test targets available online, basically a line to
focus on with a mm scale on both sides, like:
___ 5
___ 4
___ 3
___ 2
___ 1
___ 0   ----------------
___ 1
___ 2
___ 3
___ 4
___ 5

You tilt the target at 45 degrees so it makes a ramp, focus on the center
line, take the picture, then review the picture taken and observe where it
focused by noticing which numbers are sharp and so forth.

Anyhow, thanks again for the nice comments!

- THaller

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