Concepts in Photography

DOF depends on focal length

The longer the focal length is, the lower the DOF gets. A telescope lens with a longer focal length than a telescope lens with a short focal length is better to capture a photo of a low DOF.

A photo captured with a 20 mm

A photo captured with a 100 mm

telescope lens

telescope lens

DOF depends on the distance between the subject and the camera

The shorter the distance between the subject and the camera is, the lower the DOF gets. Therefore, taking a photo close to a subject can result in a photo of low DOF.

A photo captured with a 100 mm telescope lens

A photo captured close to the subject

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