Celestron 90° Angle Diagonal Mirror, 2".

This high quality 90-degree multicoated mirror diagonal allows you to take advantage of the wider field of view provided by 2" eyepieces. A much higher quality than standard diagonals, it fits all rear cells of Schmidt-Cassegrains (comes standard with CGE 1400). Includes an adapter to accept 1 1/4" eyepieces and an adapter to use with refractor telescopes.