The new ZWO 2-inch Filter Drawer features an anti-light-leaking design that can effectively illiminate light leaking issues under long exposure times.
With a 21mm ring insertion length the ZWO 2″ filter drawer replaces the standard 21mm space supplied with ZWO cameras to preserve the 55mm backfocus requirements of most imaging trains.
ZWO 2″ filter drawer includes a M42 * 0.75 external male thread on the camera side, a M48 * 0.75 internal female thread for 2″ mounted filters and a M48 * 0.75 internal female thread on the telescope side.
The filter drawer also comes with the M48-M42 adapter. You can use it with your camera or your telescope.
Double strong magnets create stronger adsorption, easier installation and pulling out.