Assertion: telephoto lens's length | /r/HasProperty | normal
Facets:
value: in cinematography
type: OTHER
Source sentences:
text: For a 35mm camera with a diagonal of 43mm, the most commonly used normal lens is 50mm, but focal lengths between about 40 and 58mm are also considered normal.
text: Camera Format Focal Length "Normal" or "Standard" 1/4" 4mm 1/3" 6mm 1/2" 8mm 2/3"
text: In cinematography, a focal length roughly equivalent to twice the diagonal of the image projected within the camera is considered normal, since movies are typically viewed from a distance of about twice the screen diagonal.