Want to be able to quickly switch between LRGB or narrowband filters when astrophotographing with a monochrome ASI camera? The ZWO EFW 8×1.25 Filter Wheel makes that possible fully automatically and without image shift.
The stepper motor of this filter wheel is precise, quiet and comes from the renowned Japanese brand NPM. Thanks to the short distance of 10 mm between filter and sensor, no vignetting occurs even with fast optics (such as f/4 or f/5).
This filter wheel is ideal for users of lighter ASI cameras or compact setups where weight and space are an issue.
Characteristics:
- Capacity: room for 8 1.25″ filters
- USB-powered (no external power needed)
- Fully integrated with ZWO ASI cameras and ASIAIR systems
- Only 20 mm optical length
- Lightweight (400 grams), CNC-machined aluminum
Included:
✓ USB 2.0 cable
✓ Fastening screws
✓ T2 threaded adapters
What you can do with it
✓ Fully automatic switching between up to 8 filters
✓ Use with LRGB, H-alpha, SII or OIII filters
✓ No focus shift on filter change
✓ Compatible with ASIAIR, NINA, and other software
✓ Perfect for compact astrophotography setups
Specifications
| Feature | Value |
|---|---|
| Filter format | 1.25 inches |
| Number of filters | 8 |
| Camera side connection | T2 (M42x0.75) |
| Telescope connection | T2 (M42x0.75) |
| Optical length | 20 mm |
| Nutrition | USB 2.0 |
| Power consumption | 150 mA |
| Engine | Stepping motor (NPM) |
| Material | CNC aluminum |
| Weight | approx. 400 grams |
| Series | ZWO EFW |









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