When shooting birds or mammals all five-focus areas work great. But when shooting macros (1X - 4X life-size) only the center, top, and bottom focus areas seem to work. The left and right areas do not focus even though I can see that the subject is in focus. I use the MF-28 data back’s ‘focus priority’ function and I have adequate light on the subject. Has anyone had the same problem? Are the center, top & bottom focus areas perhaps more sensitive than the left & right ones?
#1. "RE: F5 Focus Areas" | In response to Reply # 0f5fstop Basic MemberWed 17-Jan-01 08:20 PM
No, as a matter of fact on the F5 the right, left and center are more sensitive. They are both cross type sensors with double configurations. Cross type in that they can focus on both horizontal and vertical lines (subjects) with no problem. Double configuration in that they have a thin cross sensor for fast detection of bright light, and a thick cross sensor for enhanced detection of low-light levels.
The right and left cross sensors are also slightly angled. The top sensor is angles a bit, but it is a single line sensor that should be able to focus on either horizontal or vertical lines; however with more emphasis on vertical lines than horizontal.
The bottom sensor is a thin line sensor used for vertical lines or subjects and desiged primarily for use when the camera is in vertical position.
So, my question is: When you say the right and left sensors are not as sensitive is the camera in horizontal (prism at top) or vertical position?
Only thing I can think of.
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