evlPanda said...Gestalt said...
something strange,
i took some photos on the weekend, most of which sucked very badly.
but out of the good ones was a sequence of a backloop.
strange thing is that the depth of field changes in each image. (which were taken in burst mode on aperture priority)
the first photo, background is blurred,
second photo background is not blurred foreground is blurred
third photo same as the first.
fourth photo same as the second.
in all photos the subject is in focus.
40d with 70-300mm ef-s is usm.
i don't get it?
You should have bought the Nikon.
But really, how can the foreground OR the background be out of focus keeping the subject, which is i assume in the middle, in focus? How close was the foreground/background? You'll need to upload an example, say shot #1 and #2.
Since it is on Aperture it is more likely that the camera has decided to change the focal point between shots. What was the focus program thingy on: Area, Point, Dynamic, Mutable, Drunk, I forget the names... you know what I'm talking about.
no offence but the fact that your saying you should have bought a Nikon shows that you know about as much about photography as Gestalt.
Gestalt,
My guess is you had the camera set to continuos focus. When your cam is on that setting it will need to do the following:
1) select a focus point (either 9 point selective or specific focus point)
2) focus on the object you are trying to photography and make sure the camera is locked on
3) assuming your camera locked on correctly it should now track the moving object automatically; this will not happen correctly if there is very little contrast difference between your object and the background; in that case the camera will start hunting for focus.
As I said this has 0 to do with the camera and everything to do with the operator.
However, you might find the following technique easier:
1) set your camera to single focus
2) set your focus point to either the center point or left or right most focus point
3) focus on the object and start shooting, after half a second re-focus and shot again
This takes some practice and won't work if you have a slow focusing lens.
So don't let anyone tell you, you should have bought a Nikon. As always, the camera is only as good as the photographer... not the other way around. The fact that there are so many bad photos on in the Gallery section proofs this...