ZWO EFW - 5 x 2" - Discontinued

High-Quality Construction

CNC-milled from aircraft-grade aluminum for durability and precision.

Lightweight and compact design for seamless integration into your astrophotography rig.

Reliable Performance

Powered by a premium NPM stepper motor from Japan, ensuring smooth and accurate filter transitions.

Versatile Filter Compatibility

Supports 2″ threaded filters or 50.4mm ± 0.5mm unmounted filters.

Designed to eliminate vignetting when paired with ZWO cameras like the ASI6200MM Pro.

Minimal Power Requirements

Operates with a single USB 2.0 cable, consuming just 120mAh @ 5V.

Connect directly to the USB hub of ZWO Cooled Cameras for effortless cable management.

Two Configurations Available

EFW 5 x 2″: Holds 5 filters for users requiring fewer filter transitions.

EFW 7 x 2″ Accommodates 7 filters for more advanced imaging setups.

Optimal Pairings

Recommended for use with ZWO 2″ RGBL filters, ensuring near 1:1:1 RGB color balance.

When connected to the ASI6200MM Pro, the distance from the filter to the sensor is 18mm, reducing light leakage and optimizing imaging results.

Installation & Usage

1. Install filters:
   Ensure unmounted filters are less than 7.5mm in thickness and 50.8mm in diameter.
   Threads must be less than 2.7mm in thickness.
2. Attach the darkening sets (included) to address light leakage issues.
3. Connect the EFW to your system using the included USB 2.0 cable.
4. Install the ASCOM driver for seamless integration with your astrophotography software.

Why Choose ZWO EFW?

Compact and lightweight: Slim design and durable construction make it easy to incorporate into your imaging setup.

Precise control: Clockwise and counterclockwise rotation ensure accurate filter selection.

Power-efficient: Requires only a single USB cable for power and control.

Versatile options: Available in 5 or 7 filter configurations to suit your imaging needs.