The New ZWO Filter Drawer EOS Lens is independently designed by ZWO and specifically made to match with ASI cooled cameras and EOS lens.

It adds 26.5mm to your image train.

ou can freely use the 2” mounted filter with it.

1. It’s compatible with all ASI cooled cameras with 17.5mm back focus length (except ASI GT series).
2. It’s compatible with all ZWO 2” filters, including the duo-band filter, narrowband filter, IR-cut filter, etc.

Below requirements must be met while using the 2” filter from third-party.

With the ability of double strong magnetic adsorption, it is more convenient and much easier to install or pull out the filter.

The thread of the interface is M42*0.75. You can also use the M54M-M42F adapter to connect the filter drawer to a full-frame camera.

Connecting to your Canon EOS Lenses

With ASI1600/294/183/533：

With ASI6200/2600/071:

ZWO Filter Drawer EOS Mechanical Drawing and Dimensions