For 31mm, 36mm & 51mm unmounted filters: (Please use the M2 screws and masks to fix the filters, which are
included in the package.)
⚫ Remove the screws securing the back cover and remove the back cover
⚫ Place filters onto the filter positions.
⚫ Use the included M2 screws with masks to secure the filters in place.
⚫ Replace the back cover and tighten the screws.
Connecting ZWO EFW to Camera
You can connect your camera to the EFW with a 1.25" nose piece or simply thread it directly to the M42
interface. Please pay attention to the direction of EFW when you connect to the camera to ensure that the filters
are as close to the sensor as possible to minimize the chance of vignetting.