1mm Long 42mm Spacer Ring (SFE-M42-001)

Name: 1mm Long 42mm Spacer Ring (SFE-M42-001)
Brand: Stellarvue
SKU: SFE-M42-001
Price: 8.96 USD
Availability: InStock
Rating: 4.8 (5 reviews)

1mm Long 42mm Spacer Ring (SFE-M42-001) - Main image

$8.96 ~~$14~~ In stock

Category: Astrophotography Accessories

Description

This is a precision, CNC machined 42 mm ID spacer ring that is 1 mm thick. It provides 1 mm of additional space between the field flattener and the imaging camera.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Andrew A. ★★★★★ Oct 20, 2026

I was worried about getting the spacing exactly right for my camera setup, but this 1mm ring threaded on smoothly and fixed the back focus issue immediately.

Penelope G. ★★★★★ Oct 19, 2026

The CNC machining is flawless—threaded perfectly onto my setup without any play. Exactly the precision I needed to fix my spacing.

Miles ★★★★★ Oct 18, 2026

I needed exactly 1mm to dial in my back focus, and this ring fits perfectly without any play. The matte finish is a nice touch—no reflections to worry about in the optical train.