Hi, I posted this at DPR but got the feeling I'm getting cold shoulder treatment overthere (not sure what I did though) so I'll try my luck here.
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Godfrey wrote:
>
> In my testing, the manual in-focus confirmation in Pentax DSLRs is
> good enough to give excellent results with lenses at f/4 or smaller
> openings. It is NOT accurate enough to critical focus at f/1.4 to f/2.8
Godfrey ... hope you don't mind me quoting this old post of yours.
I've just found Godfrey's statement above spot on with my FA43.
Light was good but for testing I shot at f/2.8 thus shutter 1/2000s. First shot: focused at infinity before auto-focused at object (a black on white signboard at ~15ft). Second shot: focused at a near point before auto-focused at object so to make it focus from opposite direction. Thrid shot: turned focus ring away before refocused manually at object. The manual shot was better focused than both 1st and 2nd.
Please help explain for me why: light was good, aperture was open, the auto-focus mechanism should have no problem seeing the object clearly (meself no 20/20 had no problem seeing it!) so why couldn't it focus well at f/2.8 yet ok at higher numbers? Thanks.
Last edited by Kguru; 09-17-2007 at 06:55 PM.