Originally posted by Nicolas06 I think this is complex subject... 33AF points are likely enough for a user to select the AF point he want for some precise composition. Having more would be counter productive: more time to select the right point.
You speak for you I agree, because you have seldom or never seriously done sport photography. So in your opinion, AF point selection is used to select an AFS point to focus on a subject that is not in the center, and you could do that by using a single point and recompose. Now, consider a moving subject and you what to track the subject off the center of the frame. Please do yourself a favor, go out with your K-3 and shot moving subjects with AFC multi-points. You want a nicely framed moving subject (for instance by the rule of third), the camera would lock focus on the preselected AF point (default is the center point), and then the AF servo tracks the moving subject with adjacent points when the subject moves away from the first lock point. If you'd do that experiment, you'd realize that K-5 could not do it to the 1/3rd rule, and the K-3 could barely do it, and since the FF sensor is larger, 33 AF points on a full frame camera is about the same of when you had 11 points AF on the K-5 and previous 11 point AF Pentax cameras, it isn't much by today's standards. I visited your gallery of photos, several times, and you have a number of really nice photos, but, for what you do, I'm sure that you have to test AFC tracking in the situation I indicated to understand how valuable is large AF zone with many point in those situations. When you'll have played a bit with AFC, you can discuss. That being said , again , for static subjects, you don't even need 11 AF points, one very low light sensitive center point is sufficient.