<p>Focus can sometimes be off for me too. Good thing you can read the focus distance in the viewfinder, use that to make your own assessment before pressing the button. Pressing the focus button a few times, to check for consistency of focus, can also be used. But don't shoot wide open unless you really have to.</p>
<p>As for metering, remember this is a simple centre-weighted meter. +1 or +2 stops on negative film never hurt anybody, so why not do it all the time?</p><div></div>