ZWO Darkening Ring Set for EFW & APS-C or Full Frame ASI Cameras* - DR-D88

The D88 Darkening Ring Set will help solve any possible light leak issue occurring in the gap between EFW 2" or 36 mm seven position filter wheels and all ASI APS-C or Full Frame cameras *except the ASI461MM-P, which uses the ZWO D90 Darkening Ring Set.

The D88 set includes four (4) rings.  All have an external diameter of 88 mm and are approximately 0.2 mm thick.  Two have an inside diameter of 55 mm and two have an inside diameter of 58 mm.  The 55 mm ID rings go between the OAG-L and the EFW, and the 58 mm ID rings goes between the EFW and the camera.

Here is the order in which you install the rings: