Concepts in Photography
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Look at these photos below and compare the changes.
20 mm angle 50 mm angle 200 mm angle
Normally, a lens with a wide angle is suitable for shooting landscapes and a lens with
a narrow angle is recommended for shooting sports events or portraits.
Depth of field
Portraits or still-life photos mostly acclaimed by people are the ones on which the
background is out of focus so the subject looks pronounced. Depending on the focused
areas, a photo can be blurred or sharpened. This is called ‘a low DOF’ or ‘a high DOF’.
The depth of field is the focused area around the subject. Therefore, a small DOF signifies that
the focused area is narrow and a large DOF means the focused area is wide.