How can I know how far the in focus area extends
12506
What exactly determines depth of field?
32959
How can I get more of this macro photo in focus?
111603
Derive the centroid of an area from a limiting procedure
77911
Getting extent of layer in QGIS?
134974
What is the focal length on your typical cell phone camera?
29726
short view distance in 3d view?
8218
What's the arc length of an implicit function?
35002
Is there a 'rule of thumb' that I can use to estimate depth of field while shooting?
153578
Variable focal length for macro lenses?
152194
How far can characters see?
141231
Area of a image region
25053
How do I find the area of this region?
148913
Image of concave mirror when object is farther than the focal point
70918
When a 'blur' event occurs, how can I find out which element focus went *to*?
75901
How do I set focus follows mouse?
9238
Zooming in and highlighting part of picture
1032
What is the reference point that the focal length of a lens is calculated from?