ZWO EFW Version II
Best reliable filter solution for dedicated deep sky imaging enthusiasts
This is the essential upgrade for monochrome imagers who are tired of manually swapping filters in the dark. Its ultra-slim profile keeps your imaging train compact, though you’ll need to commit to a specific filter size to make the automation work.
$299.00
at
Astronomics
More Electronic Filter Wheel options
Who it's for
- Astrophotographers needing precise back-focus management for their imaging rigs
- Clean-setup enthusiasts prioritizing efficient cable management and simple connectivity
- Serious hobbyists seeking long-lasting equipment that protects their optical investment
Who should skip it
- Owners of thicker, non-standard filters requiring more internal housing space
- Mixed-brand users who prefer universal compatibility without software workarounds
- Mobile observers who frequently change filter sets during a session
Performance breakdown
Backfocus Efficiency
The ultra-slim 20mm profile fits easily into tight imaging trains.
Mechanical Precision
High-quality stepper motor ensures reliable, repeatable filter positioning every time.
Workflow Automation
Software-driven switching removes manual intervention from long-exposure imaging sessions.
Build Durability
CNC-machined aluminum construction offers a robust, lightweight housing for sensitive optics.
Power Integration
Single USB cable simplifies cable management by handling both data and power.
Filter Capacity
Seven slots provide ample room for comprehensive LRGB and narrowband filter sets.
Key Specs
Filter Capacity
7 slots
Filter Size
36mm unmounted
Thickness
20mm
Weight
17.6 oz
Material
CNC-machined aluminum
Motor
NPM stepper motor
Power Consumption
120mAh @ 5V
Connection Interface
USB
Warranty
2 years
Know before you buy
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Ask Metto anything about the ZWO EFW Version II before you decide.
