ALTO-3L adapter for OS RiDK 400

Name: ALTO-3L adapter for OS RiDK 400
Brand: PrimaLuce
SKU: PL3700141
Price: 349.65 USD
Availability: InStock
Rating: 5.0 (5 reviews)

ALTO-3L adapter for OS RiDK 400 - Main image

$349.65 ~~$555~~ In stock

Category: Astrophotography Accessories

Description

This adapter allows you to connect ALTO-3L telescope cover motor to the front part of the OS RiDK 400 telescope.

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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 (5.0 / 5 · 5 reviews)

Ellie E. ★★★★★ Oct 21, 2026

Fits the RiDK 400 threads perfectly and the aluminum feels solid in hand—no wobble at all when attaching the motor cover. Mounted it in under two minutes and the whole setup feels much more stable now.

David Y. ★★★★★ Oct 20, 2026

Machined to the exact spec of the RiDK 400’s front thread, so there’s zero wobble when I attach the motor. Took under a minute to screw on out of the box, and the whole setup feels rock solid for guiding.

Richard ★★★★★ Oct 19, 2026

Fits perfectly onto the OS RiDK 400 without any wobble, so my motorized cover is now rock solid. The threading is smooth and precise—no cross-threading issues at all during installation.