With a male/female thread as input/output.
For autoguiding, this iNova accessory is recommended in order to reduce the F-ratio of an instrument (with a high F-ratio) used as a guide telescope (refractor, Maksutov-Cassegrain or Schmidt-Cassegrain).
It improves sensitivity when detecting a guide star and reduces the turbulence effect on the aforementioned guide star (i.e. bad effect when autoguiding).
MarkS July 1st 2014
|Name||iNova - Focal reducer 0.5x with M28.5mm thread|
|Custom Stock Status||Available - Ships in 3-5 Days|