ZWO EFW Version II
Best automated filter solution for dedicated deep sky astrophotographers
This electronic filter wheel streamlines deep-sky imaging by automating filter changes, removing the need for manual intervention during long sessions. Its thin, lightweight design integrates seamlessly into existing imaging trains without adding significant backfocus, making it an essential upgrade for monochrome camera users.
$299.00
More Electronic Filter Wheel options
Who it's for
- Astrophotographers needing to maintain strict backfocus distances for optimal imaging
- Mobile imagers looking to streamline their cable management and power requirements
- Serious hobbyists requiring repeatable filter positioning for high-quality calibration
Who should skip it
- Users committed to non-ZWO hardware ecosystems seeking universal plug-and-play compatibility
- Visual observers or photographers who frequently change filter sets between sessions
- Tech-forward users prioritizing the fastest possible data transfer and connectivity standards
Performance breakdown
Backfocus Efficiency
The ultra-slim 20mm profile integrates seamlessly into tight imaging trains.
Mechanical Precision
Stepper motor reliability ensures consistent filter alignment for every single exposure.
Software Integration
Native support for NINA and ASCOM makes automation setup incredibly straightforward.
Build Durability
CNC-machined aluminum housing withstands the rigors of frequent field use.
Power Convenience
USB-only power simplifies cable management and reduces rig clutter significantly.
Capacity Versatility
Seven slots provide ample room for complex LRGB and narrowband filter sets.
Key Specs
Filter Slots
7
Filter Size
36mm unmounted
Thickness
20mm
Weight
1.1 lbs
Material
CNC-machined aluminum
Motor
Stepper motor
Power Source
USB
Voltage
5V
Warranty
2 years
Software Compatibility
ASCOM, ASI Studio, NINA, SGP
Know before you buy
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