Originally posted by jlstrawman Please tell us about your AF experience with the K-3, and why it is not good for shooting people?
This is my conclusion from following:
- from my own K-5II experience
- ongoing reports in forums, that the K-3 AF can be worse than the K-5II(s) AF (obviously dependent on preferred motives and lenses used).
From my K-5ii, I learned (the hard way), that the Pentax AF sensor areas are surprisingly big, do overlapp each other a lot (more than 50%), and have inconvenient, awkward shapes (the outer ones have inconvenient T and L shapes, rather than cross). Which pushes the blur failure rate quite high, if shooting people at whole-body-distance (like in fashion or street photography).
Desiring a better AF (esp. AF-C) has always been on Pentax users' wish lists, which don't just shoot two-dimensional motives (2-dim = everything relevant is in infinity, like in landscapes or cityscapes). This desire didn't vanish with the K-3.
From other forum users, at least those with shoot three-dimensional motives, I hear about their disappointing K-3 AF experience. And this is not rare. Just this month (Feb 2015), I came across another such finding in pentaxians.de:
user Klabo said: "Ich hatte am Wochenende ein paar Aufnahmen im Nahbereich gemacht, und dort den selektiven Fokuspunkt außerhalb des Zentrums positioniert. Alles durch den Sucher, nicht mit LV. Auch hier hatte ich das Gefühl, dass der Fokus in diesen Fällen nicht saß."
user 'Hooky' responded: "wollte dazu noch sagen, dass dieses Problem bei mir und bei meiner K3 auch mit fast jedem anderen Objektiv auftritt. Bei der K30 habe ich das Problem nicht oder wesentlich geringer in der Anzahl. Vielleicht ein K3 Problem?" "Vielleicht liegt ja der Fehler mehr bei der K3?"
In English:
Klabo shot some close-ups and recognised, that all focus points except the central ones don't focus well.
Hooky responded, that this problem occurs with his K-3 also with almost every other lens he owns. With his K-30, he either didn't have this problem, or occurences where much less frequent. He therefore suspects, that this is a K3 problem.
To me (with my recent people shooting preferences, YMMV), the K-3 AF still appears too flawed to be considered as an upgrade target from my K-5II. That's why I'm interested in a K-3 successor, and let's pray, that it will least match the performance of a Nikon D7100 / D7200.
Last edited by Frater; 02-28-2015 at 08:53 AM.