Assertion: eyepiece's field | /r/HasProperty | tfov
Facets:
Source sentences:
text: And what's the difference between Apparent Field of View (AFOV) and True Field of View (TFOV)?
text: Measured as a visual angle at the focal point, this is the field angle α of marginal rays, and twice this width is the projected true field of view (TFOV)
text: The true field of view (TFOV) is the amount of sky you will really get to see.
text: These determine the true field of view (TFOV) by their ratio: TFOV = AFOV/M t .
text: The eyepiece true field of view (TFOV) is the angular width of the image content, as measured in the naked eye image space (for example, on the celestial sphere).