Assertion: diurnal motion | /r/CapableOf | eliminate its arcing effect
Facets:
value: on a long exposure
type: TEMPORAL
Source sentences:
text: Conversely, following the diurnal motion with the camera to eliminate its arcing effect on a long exposure, can best be done with an equatorial mount, which requires adjusting the right ascension only; a telescope may have a sidereal motor drive to do that automatically.