Note on use of Prism Correctors
1) Both 1x and 2x correct prism aberrations (spherical, color, and edge of field astigmatism). The faster the system the greater the need.
2) The 1x does not compensate for Bino Vue path length while the 2x does: the Bino Vue with 2x corrector can be swapped into a focuser without need to refocus.
3) The 1x corrector is:
*essential for fast systems (f/4 - f/6)
*helpful for moderate systems (f/8 - f/10)
*not necessary with slow systems (f/12 - f/15)
Note: When SCT's are refocused for Bino Vue path length, f/10 systems operate at f/12.5, hence the corrector is not necessary.
4) Both 2x and 1x are effective correctors with any speed telescope.
