Assertion: telephoto lens's length | /r/HasProperty | given in relation
Facets:
value: to the full-frame size
type: OTHER
Source sentences:
text: All Sigma lens focal lengths are given in relation to the full-frame size, whether it’s a DG or DC lens, so whenever a lens is mounted on a APS-C sensor camera, it is necessary to take the sensor size into account and adjust the apparent focal length and field of view accordingly.