21Concepts in PhotographyDOF depends on focal lengthThe longer the focal length is, the lower the DOF gets. A telescope lenswith a longer focal length than a telescope lens with a short focal lengthis better to capture a photo of a low DOF.A photo captured with a 20 mmtelescope lensA photo captured with a 100 mmtelescope lensDOF depends on the distance between the subject andthe cameraThe shorter the distance between the subject and the camera is, thelower the DOF gets. Therefore, taking a photo close to a subject canresult in a photo of low DOF.A photo captured with a 100 mm telescope lensA photo captured close to the subject
