Was'nt there an old saying, A poor tradsman always blames his tools , I shoot with the Sigma 10-20 on AF and never had a problem with DOF , Always sharp as a tack to the horizon , BTW I never look at the distance scale
Was'nt there an old saying, A poor tradsman always blames his tools , I shoot with the Sigma 10-20 on AF and never had a problem with DOF , Always sharp as a tack to the horizon , BTW I never look at the distance scale
according to the manual:
If Canon recommend this mode for candids, non moving subjects closest to the camera, or tracking a single subject moving across the frame, how about testing the feature on the types of uses Canon recommend, instead of the types of scenes Canon recommend against!Best for: Candids and other non-moving subjects where you want to quickly focus on whatever is closest to the camera, or single moving subjects that you expect will move across the composition as you continue to shoot.
Not recommended for: Situations where you need precise control over the point of focus.
wowsers, thanks for the extensive reply arthurking
Are you talking about the distance corresponding to the different locations of the highlighted focus points, or are you talking about observing distance displayed on the lens scale. If the latter, what sort of readings were you getting, simillar to mine?
Hmmm very interesting assumption, makes sense to me. I didn't defocus my camera also, so this all seems pretty consistant.
To be honest i completely forget the motivation for the test, maybe i was playing around with my camera out of curiosity sake, and noticed what appeared to be unusual bahaviour. I posted this topic to see if this was a commonly known behaviour or not. I expected the camera to be more repeatable with selecting infinity each time, but your hypothesis or assumption could be the explanation for why that is not the case.
I'll re-do my test after defocusing to see if i get the same results as you.
BTW, did you mention if you used a tripod or not?
The 7D has a very similar feature. Though i am not sure if it uses colour to follow your object.
You select your starting point, and it follows your target regardless of how you frame it (obviously as long as it stays within the area of the 19 AF points). I haven't tested it out on a proper moving target though so not sure how good it is.
Anyway thanks again, excellent post.
Oh and I am not saying that because of ricktas post.
Last edited by pmack; 09-03-2011 at 9:07pm.
Hmm suppose it depends how you interpret what they say, or more importantly how you are supposed to interpret it.
"non-moving subjects where you want to quickly focus on whatever is closest to the camera" could still be used to explain the scene at infinity. The scene close to infinity may still contain the closest objects to the camera. And "precise control over the point of focus", I think they are referring to control over which part of the frame it focusses on, rather than the accuracy. Although obviously you do get better accuracy with the one point anyway.
Still to test out the how Automatic point selection works in servo mode.
nice bump, champion.
btw, in the OP when i said it was selecting past infinity with center point auto focus, i think this is correct as the other day i found infinity on the lens to be slightly past the vertical infinity mark, so halfway across the horizontal line. so results are only bad when all focus points are selected, which would rarely affect me so no biggie
still testing your lenses??
i find the more you tell the camera to do, ie less auto settings as possible.. the more control over the image you have...
so setting it in auto with all the focus points on is kinda not really a test, specifically when the lens has such a short infinity setting...
M
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