Knowing the approximate distance to the star, and the plate scale
of my images, it is possible to work out the distance in space and hence the light travel time from the star to the nebula.
granulata, the radial slits are positioned near the margin and its plate scale
's also lack the nearly marginal parallel ribs.
features a "Uni-body" tread plate scale
deck with laser cut and precision bent and welded corners.
To calculate how much sky your camera will cover with a given lens, divide 57.3 by the lens's focal length in millimeters to get the lens's plate scale
in degrees per millimeter, and then multiply the scale by the dimensions of the CCD's pixel array in millimeters.
THE KHAIRPUR PLATE SCALE
ORDER V, VI and VII - 4 F:
With a plate scale
of 2.6[degree sign] per cm, each image covers almost 8 percent of the sky, permitting generous overlapping of neighboring star fields.
THE INDEPENDENCE DAY PLATE SCALE
ORDER VI and VII - 4 F:
Each plate would cover only about four square degrees of sky, yielding a plate scale
close to 1 arcminute per millimeter.
Not until 1991 did I get the chance to photograph this fascinating object with the larger plate scale
of the 4-meter Anglo-Australian Telescope.
THE FORTNITE PLATE SCALE
ORDER I, II, III and IV 4 F: