ZWO 2″ Filter Drawer (M42) - FD-M42-II

This second-generation ZWO M42 Filter Drawer features a 21 mm ring design and contains two strong magnets for more substantial adsorption and easier installation/removal. Compared to the previous version of ZWO's M42 filter drawer, this filter drawer features an improved seal to reduce the chance of stray light leaking onto the filter. This improvement is particularly important and noticeable over long exposures. A lock screw provides tension adjustment between the filter holder and drawer to eliminate any gap.

The ZWO Gen 2 Filter Drawer has an M48 x 0.75 female thread to be used with 2" filters, an M48 x 0.75 female thread for connection to a telescope, and an M42 x 0.75 male thread to connect to an astronomy camera. Compatible with the ZWO 2" Filter Holder (Gen 2). Suitable for 2-inch astronomical filters. Also included is a ZWO M48-M42 adapter plate which enables the use of two M42 or two M48 threaded accessories simultaneously.

This new version of the ZWO M42 2" filter drawer is NOT compatible with the first-generation ZWO spare filter holder.

New 2″ filter drawer featuring the anti-light-leaking design that can effectively solve the light leaking issue under long exposure.

(M42)

(M54)

Two sizes available: M42 and M54.

Double strong magnets adopted for stronger adsorption, easier installation and pulling out.

Lock screw on the side for you to adjust the tension of the holder to eliminate gap. Double insurance.

(M42)

(M54)

Additional adapters provided with the filter drawer for equipment connection.

The differences between the old and new filter drawer

What’s in the Box?

 M42 filter drawer:Filter drawer *1M48-M42F adapter *1

 M54 filter drawer:Filter drawer *1M54-M48F-2mm *1

Mechanical Diagram

 M42 filter drawer:

Diameter 70mm * Thickness 21mmM42 * 0.75 male(external) thread (camera side)M48 * 0.75 female(internal) thread (filter end)M48 * 0.75 female(internal) thread (telescope side)

Suitable for 2-inch astronomical filters。

 M54 filter drawer:Diameter 70mm * Thickness 20mmM54 * 0.75 male(external) thread (camera side)M48 * 0.75 female(internal) thread (filter end)M54 * 0.75 female(internal) thread (telescope side)

Suitable for 2-inch astronomical filters and full frame cameras, such as ASI6200 and ASI2400.