Cloud Break Optics

M42-M42 Spacer - 21mm

M42-M42 Spacer - 21mm - Main image
M42-M42 Spacer - 21mm - View 2
$10.98 $18 In stock

Category: Astrophotography Accessories

Description

This is a 21mm spacer, threaded on both ends with M42 threads. This spacer will help you achieve correct back distance for corrected optics.

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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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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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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 (4.4 / 5 · 5 reviews)

Kevin C. ★★★★★

Finally got the right spacing for my reducer with these threads—screwed on perfectly and didn’t have any wobble. It’s exactly 21mm as advertised, so no more guessing with shims.

Mia ★★★★★

Finally a spacer that actually measures exactly 21mm on my calipers. The threads are smooth and catch cleanly, which made getting my camera sensor to the perfect back focus a breeze.

Michael ★★★★☆

Was worried about getting the exact back focus distance for my telescope, but the double female M42 threads make it really straightforward to stack with other rings. Arrived quickly and the threads are clean without any binding.

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