Assertion: lens's length | /r/HasProperty | measured
Facets:
value: from rear
type: OTHER
value: in millimeters
type: OTHER
value: from the sensor
type: OTHER
value: from the rear nodal point
type: OTHER
Source sentences:
text: Instead, focal length is measured from the rear nodal point—which, along with the focal point, is one of the cardinal points in Gaussian optics—to the focal point while the lens is focused at infinity.
text: Focal length is the measurement (in millimeters) from the optical center of a camera lens to the camera’s sensor.
text: You really don’t need a very deep understanding of how focal length is measured to take good photos; you just need to know what it means for your photos.
text: Effective focal length is measured from the sensor to where the light cone going to the sensor is the same size as the lens front opening.
text: It is often misunderstood that the focal length is measured from the front or rear of the lens.