The newly redesigned ZWO M54 filter drawer allows you to manually add a 2" mounted filter to your optical train. This updated design is better sealed than the previous version, so light leaks are no longer a problem with extremely long exposures.
The included filter holder has a M48 x 0.75 thread for standard 2" filters. Two magnets secure the draw and a grab screw adjusts its tension. The drawer includes a M48 female - M54 male adapter to adapt the drawer to accessories with M48 x 0.75 thread. It has an optical thickness of 21mm.
This particular filter drawer is compatible with the ZWO OAG-L off axis guider
Note: The previous version of the filter holder is not compatible with this V2 filter drawer. Likewise, the V2 filter holder is not backwards compatible with the previous filter drawers.
Note: ZWO filter drawers are only suitable for use with filters whose housings are 7.5mm thick or less. Please refer to the below diagram before purchasing this item: