ZWO EFW 7 x 50mm Square Filter Wheel
ZWO
ZWO EFW 7 x 50mm Square automates filter changes for mono imaging with 50mm filters.
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Specifications
Mechanical
- Wheel type
- Electronic filter wheel
- Capacity
- 7 positions
Filter
- Filter size
- 50 mm
Electronics
- Interface
- Electronic computer control
Use
- Primary use
- Automated LRGB and narrowband filter changes for mono imaging
Power
- Power
- 120 mA at 5 V
Astrophotography Fit
Best for mono rigs that need repeatable LRGB and narrowband filter sequencing.
ZWO EFW 7 x 50mm Square turns a monochrome camera into a practical imaging system by automating filter changes. The right wheel depends on sensor size, filter size, back-focus budget, and how many channels you want loaded at once.
Choose filter diameter conservatively. Undersized filters vignette; oversized filters cost more but protect future camera upgrades.
Best paired with
- Monochrome cooled cameras and matched LRGB/narrowband filter sets
- Autofocus routines with filter offsets
- Rigid threaded imaging trains with known back focus
Not recommended for
- One-shot color-only workflows
- Camera sensors larger than the filter size can illuminate cleanly
- Ultra-minimal travel rigs where weight and back focus are tight
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| Cloud Break Optics Cloud Break Optics | $299.00 | In stock Updated 5/10/2026 | View Offer - $299.00 |
| ZWO USA ZWO USA | $599.00 | In stock Updated 5/15/2026 | View Offer - $599.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.
Cloud Break Optics ZWO USA