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| p.2 #1 · Sigh, back to Canon... |
D. Diggler wrote:
Did you ever do a test to find out the actual size and location of the 800's focus sensor? It can be different from the little box you are looking at through the viewfinder when taking the shot.
That you say the 800 consistently catches the backlight on the side of the person's head suggests to me that you were letting a portion of the focus sensor wander off the face. If the focus sensor was completely on the face, the sensor could not pick up what's outside the face.
As I recall, I had asked you previously if you wanted...Show more →
I never did the test, but I believe I can show examples of a few specific instances where the subject was centered in the frame, there was a pretty large area of only the person's face around the center focus point, the camera was in AF-S (or AF-C single point), I re-took the shot several times, and it still consistently found the backlit edge and backfocused my target subject.
The thing is, if an autofocus system is really quirky for me to use and I have to keep thinking about how to make it work properly in a bunch of situations, then it isn't practical for me to use because I am too busy thinking about other things to be able to worry about putting the focus point exactly right and why it might not work here and there and etc...and shots will frequently be misfocused because my technique wasn't perfectly in-tune with the quirky demands of the focus system. The 5d2s I own aren't so quirky, they are just a little temperamental and limited in several aspects...like basically not trustworthy much on the outer points and only giving an average keeper rate for moving subjects.
Edited on Feb 08, 2013 at 03:36 PM · View previous versions