The total light path of the filter box assembly is optimized for the combination of ZWO/QHY(=17.5mm flange back) cameras, IDAS filters and BORG telescopes. BORG telescopes users are allowed to simply set it between the BORG and ZWO/QHY.
Camera side : M42/P0.75 male or M54/P0.75 male
Telescope side : M57/P0.75 male
Filter box accommodates 48mm and 52mm filter
Allowed to add 2nd filter box
Re-configurable for other brand telescopes.
* Note: Each camera manufacturer's flange back specs are 17.5mm +/- 0.5mm, according to them.
