|
What Raymo said plus,
The Field of View of the RC will be almost half of the Triplet.
Your image scale in acrsec per pxel is approx = px size x 200 / focal length
For the RC its = 4.63 x 200 / 1000 = 0.926 arcsec per pxel
As the camera is approx 4000pixels wide thats a Field Width of 0.926 x 4000 = 3704arcsec ( 61.73 arcmins).
For the Triplet its = 4.63 x 200 / 575 = 1.61 arcsec per pixel
Field Width = 1.61 x 4000 = 6440 arcsecs ( 107.3 arcmins)
There is also telesope resolution to consider
Dawes Limit = 120 arcsec / Objective Diameter (mm)
For the RC its 120/200 = 0.6arcsec
For the Triplet its 120/115 = 1.04 arcsec
The other difference is Star Magnitudes, a larger aperture can see fainter stars than a smaller aperture.
|