Rainbow Astro RST-300 Mount Only

Name: Rainbow Astro RST-300 Mount Only
Brand: Rainbow Astro

Rainbow Astro

Rainbow Astro RST-300 is a GoTo equatorial mount for guided astrophotography rigs.

mount flagship

Best Current Offer

Starizona

In stock

$9,290.00

Other retailers

Cloud Break Optics (In stock)
$12,280.00

Specifications

Mount

Mount type: Dual German equatorial / alt-az strain-wave mount
Drive system: Strain wave gear / harmonic drive
Payload capacity: 30 kg without counterweight; 50 kg with counterweight
Mount weight: 8.5 kg

Capacity

Payload-to-weight ratio: 5.9:1

Motion

Slew rate: 1,200x (5°/s)

Electronics

Controller: Computerized GoTo control

Specifications

Latitude range: 0 to 90 degrees

Astrophotography Fit

A general-purpose GoTo mount that should be chosen by realistic imaging payload, not headline capacity alone.

Rainbow Astro RST-300 is a flagship GoTo equatorial mount for computerized tracking and guiding.

For long-exposure astrophotography, use a conservative imaging payload. The telescope, camera, guide hardware, dew heaters, dovetails, and cables all count, and guiding performance matters more than the catalog payload number.

Best paired with

Autoguided refractors or corrected reflectors within conservative payload limits
Stable tripod or pier and balanced counterweights
Computer or hand-controller workflow with good polar alignment

Not recommended for

Payloads at the rated maximum for imaging
Users who need an airline-portable rig above all else
Long focal length work without guiding and careful balance

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
Starizona Starizona	$9,290.00	In stock Updated 11/4/2026	View Offer - $9,290.00
Cloud Break Optics Cloud Break Optics	$12,280.00	In stock Updated 11/4/2026	View Offer - $12,280.00

Price History

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

Cloud Break Optics Starizona