The back focal length is advised by telescope manufacturers. Since most telescopes have a 55mm back focal length, we are here to provide detailed instructions for all ASI cooled cameras.…
Dear Esteemed Customers,
In celebration of the National Day holiday, ZWO will be taking a short break to observe this holiday.
Please mark the following dates for our temporary closure and service resumption:
All shipping and order services will be suspended from September 29th to October 7th.
We appreciate your understanding and patience during this festive period, and wish you a joyful and prosperous the National Day holiday!
ZWO TEAM