ZWO EFW 7×36 mm Filter Wheel
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Vai al moduloThe ZWO EFW 7×36 mm (Electronic Filter Wheel) is a 7-position motorised filter wheel designed for advanced astrophotography with full-frame and APS-C ASI cameras. With 7 slots for unmounted 36 mm filters, it enables automatic switching through a complete LRGB and narrowband sequence — Ha, SII, OIII — in a single session, without touching the optics and without losing focus. Powered and controlled directly via the built-in USB-C hub of the ASI camera.
7 positions: maximum flexibility for narrowband imaging
With 7 slots, LRGB, Ha, SII and OIII filters can all be loaded at once — the full combination for SHO and LRGB imaging — without ever opening the optical train. The high-precision stepper motor reaches each position repeatably and silently. Filters sit only 10 mm from the sensor, eliminating vignetting even with fast telescopes.
T2 connection and native ASIAIR integration
Both telescope-side and camera-side connections are T2 (M42×0.75). The EFW 7×36 mm integrates natively with ASIAIR Mini, ASIAIR Plus and ASIAIR Pro for fully automated filter sequences. Optical length: 20 mm. T2 adapter included.
CNC aluminium body, high stability
The CNC-machined aluminium body ensures rigidity and thermal stability during long night sessions. Power draw of 120 mA via USB-C makes it compatible with any hub or power bank.
Technical specifications
| Filter positions | 7 |
|---|---|
| Filter format | 36 mm unmounted |
| Telescope-side connection | T2 (M42×0.75) |
| Camera-side connection | T2 (M42×0.75) |
| Optical length | 20 mm |
| Filter-to-sensor distance | 10 mm |
| Power supply | USB-C (ASI camera hub) |
| Power consumption | 120 mA |
| Motor type | Stepper motor |
| Material | Aluminium |
| Weight | 515 g |
| Manufacturer | ZWO (Suzhou ZWO Co., Ltd.) |