> Ed asked: > A while back, someone had written how the MZ-S AF sensors were each > sensitive to both horizontal and vertical lines, because of (I think) > some software design. Can someone point me to where that information > is explained? And why doesn't Pentax market it?
> Thanks, > Ed Why Pentax doesn't market it? Because it is not there. I put my MZ-S against a uniform surface with a single, but evident horizontal line and then tried to focus on it with each of the six AF sensors. The middle two (horizontal sensors and thus sensitive to vertical patterns) couldn't focus on the line no matter how many times I tried. Outer four sensors (vertical and thus sensitive to horizontal patterns) lock on it with ease. When I tried this with vertical line, as expected, the situation was reversed. Both middle sensors lock on the line while outer four could not. However, there is a nifty little touch. Pentax function F8 determines the focusing state in the focusing position and can be set at two values. When it is set to 1, it uses a focus point contiguous to the default (user selected) focus point. If it is set to value 2, it disables this ability and does not use a focus point contiguous to the default focus point. The above experiments was made with F8 set to 2 so only the selected focus point was in charge of focusing and if it could not focus, that was it. However, when F8 is set to value 1, and the selected focus point can't find the focus, the contiguous point does. For example, when I select the middle (horizontal) focus point and try to focus on the horizontal line, it can't find the focus, but the contiguous (vertical) point can and it does with no delay. Of course, only when F8 is set to 1. This is not a crosshair AF sensor but in many real life situations, it works like there is. And all of them act like that, not only the middle one. Matjaz - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
