ZWO EFW 7×2" Filter Wheel
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Vai al moduloThe ZWO EFW 7×2" (Electronic Filter Wheel) is the flagship model of ZWO's EFW series — a 7-position motorised filter wheel for 2" filters, the most widely available format on the market. With 7 slots for 2" filters (M48×0.75) or unmounted 50 mm filters, it allows the complete LRGB and narrowband sequence (Ha, SII, OIII) to be loaded in a single configuration and switched automatically, without ever touching the optical train and without losing focus. Powered directly via the built-in USB-C hub of the ASI camera.
7 positions with 2" filters: the complete setup for advanced narrowband imaging
With 7 slots for standard 2" filters — the format with the widest market selection — astrophotographers can load LRGB, Ha, SII and OIII all at once for SHO and LRGB imaging without opening the optical train. The stepper motor reaches each position repeatably and silently. Filters sit only 10 mm from the sensor — no vignetting risk.
T2 connection and native ASIAIR integration
Both connections are T2 (M42×0.75). Integrates natively with ASIAIR Mini, ASIAIR Plus and ASIAIR Pro. Optical length: 20 mm. T2 adapter included.
CNC aluminium body for extended sessions
CNC-machined aluminium body for structural rigidity and thermal stability. Weight 720 g, power draw 120 mA via USB-C.
Technical specifications
| Filter positions | 7 |
|---|---|
| Filter format | 2" (M48×0.75) / 50 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 | 720 g |
| Manufacturer | ZWO (Suzhou ZWO Co., Ltd.) |