ZWO’s EFW 8×1.25″ is an electronic, USB2.0 controlled, filter wheel.
Designed to integrate tightly with their growing range of CMOS cameras it allows the use of 8 x1.25″ mounted or 31mm unmounted filters.
Plenty of room for L-RGB and Narrowband OIII, H-alpha, SII filters, and don’t forget a dark filter for taking darks.
The newest addition to ZWO’s filter wheels for imaging is the ZWO EFW 8×1.25 inch motorized model.
The body is CNC machined from a full block of aircraft-grade aluminium. The profile is very thin, only 20mm deep. It accepts 8 standard 1.25″ mounted filters or 31mm unmounted filters.
Japanese NPM stepper motors are at the heart of the EFW filter wheels so you can trust the the quality and reliability!
Smart electronics allow the filter wheel to rotate in both directions making filter change fast and precise.
Only one USB cable is enough to power up the EFW with a maximum power consumption of only around 150ma@5V
Even better you can power it from the USB2.0 hub of ZWO’s latest cooled cameras.
The filter-to-sensor distance is around 10mm when connected to the ASI1600 with the benefit that 1.25″ filters won’t have vignetting as fast as F5 focal ratio and 31mm filters won’t have vignetting down to F2.
ZWO’s newest L-RGB filters are recommended for the ASI1600. They result in a nearly 1:1:1 RGB colour balance compared to the older ZWO L-RGB filters.
What`s in the box?
- 8 x 1.25″ (or 31mm unmounted) filter wheel
- 1.25″ Holder-T2
- T2 nosepiece
- Phillips screwdriver
- M2 screws and washers for retaining unmounted filters
- T2-T2 adapter (male)
- USB2.0 cable
Power from the USB2.0 hub (EFWmini shown – but you can do the same with the ZWO EFW 8×1.25 inch)
EFW Quick Star Guide
EFW Full Manual