|Quoting michaelvandijk (Reply 9):|
I am a little confused because everyone on the internet is saying how lower the aperture value, the smaller the area that is in focus is
I had to laugh at "everyone on the internet is saying..."
They're absolutely right - a larger aperture (lower F-number) yields a smaller depth-of-field (distance range in which objects are in focus). The question is whether - with your camera, focal length, subject distance, and aperture value - it will actually affect your photo.
In general, DOF is affected in this way:
focal length: shorter = greater DOF, longer = smaller DOF
subject distance: closer = smaller DOF, farther = larger DOF
aperture: larger = smaller DOF, smaller = larger DOF (note that a larger aperture corresponds to a smaller number, so F4 has a larger aperture than F8)
So it's a matter of figuring out if changes to your focal length and subject distance will affect your DOF to the point that you need to change your aperture. For most of the aircraft shooting I do, it has negligible effect.
Here's an online DOF calculator:
I will also note that I made a mistake here:
That should have said 802 feet of DOF, approx. No idea where I got 1930 from.
I'm watching Jeopardy. The category is worst Madonna songs. "This one from 1987 is terrible".