ZWO EFW 7 x 50mm Square Filter Wheel

Name: ZWO EFW 7 x 50mm Square Filter Wheel
Brand: ZWO

ZWO

ZWO EFW 7 x 50mm Square automates filter changes for mono imaging with 50mm filters.

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Best Current Offer

Cloud Break Optics

In stock

$269.00

Other retailers

ZWO USA (In stock)
$539.00

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	$269.00	In stock Updated 8/4/2026	View Offer - $269.00
ZWO USA ZWO USA	$539.00	In stock Updated 8/5/2026	View Offer - $539.00

Price History

Chronological retailer pricing with out-of-stock points shown at reduced opacity.

Cloud Break Optics ZWO USA