Gear Database

HEM27 with High Precision Encoder

iOptron

HEM27 with High Precision Encoder is a strain-wave GoTo mount for guided astrophotography rigs.

mount premium
HEM27 with High Precision Encoder

Best Current Offer

Cloud Break Optics logo
Cloud Break Optics
In stock
$3,248.00

Other retailers

Specifications

Mount

Mount type
Hybrid strain-wave equatorial GoTo mount
Drive system
Strain-wave RA drive with belt-driven DEC
Payload capacity
29.7 lb (13.5 kg) without counterweight; 44 lb (20 kg) with counterweight
Mount weight
8.2 lb (3.7 kg)
Latitude range
15º ~ 65º

Capacity

Payload-to-weight ratio
5.4:1

Motion

Slew rate
6º/sec
Encoder
High-precision RA encoder variant

Electronics

Controller
Go2Nova® 8409 with ~212,000 objects database
Power
12V DC, 5A

Mechanical

Tripod / pier
Optional

Astrophotography Fit

A portable strain-wave mount that should be chosen by realistic imaging payload, not headline capacity alone.

HEM27 with High Precision Encoder is a premium strain-wave GoTo 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.

Strain-wave mounts are wonderfully compact, but they still need stiffness, cable discipline, and sometimes counterweighting to keep long tubes calm.

Best paired with

  • Compact refractors, cooled cameras, and tidy cable-managed power
  • Guiding from a guide scope or OAG for long exposures
  • Tripod or pier with enough stiffness for the full imaging load

Not recommended for

  • Ignoring counterweights on long or heavy optical tubes
  • Tall, flexible tripods with high wind exposure
  • Payloads near the marketing limit for long-exposure imaging

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 logo
Cloud Break Optics
Cloud Break Optics
$3,248.00
In stock
Updated 11/4/2026
View Offer - $3,248.00
Astronomics logo
Astronomics
Astronomics
$3,559.00
In stock
Updated 11/4/2026
View Offer - $3,559.00

Price History

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

Astronomics Cloud Break Optics
$3,596.32 $3,467.77 $3,339.23 $3,210.68 Sep 15, 2026 Oct 10, 2026 Nov 4, 2026 Astronomics - $3,248.00 - Sep 15, 2026 - In stock Astronomics - $3,248.00 - Sep 16, 2026 - In stock Astronomics - $3,248.00 - Sep 17, 2026 - In stock Astronomics - $3,248.00 - Sep 18, 2026 - In stock Astronomics - $3,248.00 - Sep 19, 2026 - In stock Astronomics - $3,248.00 - Sep 20, 2026 - In stock Astronomics - $3,248.00 - Sep 21, 2026 - In stock Astronomics - $3,248.00 - Sep 22, 2026 - In stock Astronomics - $3,248.00 - Sep 23, 2026 - In stock Astronomics - $3,248.00 - Sep 24, 2026 - In stock Astronomics - $3,248.00 - Sep 25, 2026 - In stock Astronomics - $3,248.00 - Sep 26, 2026 - In stock Astronomics - $3,248.00 - Sep 27, 2026 - In stock Astronomics - $3,248.00 - Sep 28, 2026 - In stock Astronomics - $3,248.00 - Sep 29, 2026 - In stock Astronomics - $3,248.00 - Sep 30, 2026 - In stock Astronomics - $3,559.00 - Oct 1, 2026 - In stock Astronomics - $3,559.00 - Oct 2, 2026 - In stock Astronomics - $3,559.00 - 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In stock Astronomics - $3,559.00 - Oct 25, 2026 - In stock Astronomics - $3,559.00 - Oct 26, 2026 - In stock Astronomics - $3,559.00 - Oct 27, 2026 - In stock Astronomics - $3,559.00 - Oct 28, 2026 - In stock Astronomics - $3,559.00 - Oct 29, 2026 - In stock Astronomics - $3,559.00 - Oct 31, 2026 - In stock Astronomics - $3,559.00 - Nov 1, 2026 - In stock Astronomics - $3,559.00 - Nov 2, 2026 - In stock Astronomics - $3,559.00 - Nov 3, 2026 - In stock Astronomics - $3,559.00 - Nov 4, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 15, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 16, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 17, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 18, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 19, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 20, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 21, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 22, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 23, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 24, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 25, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 26, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 27, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 28, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 29, 2026 - In stock Cloud Break Optics - $3,248.00 - Sep 30, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 1, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 2, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 3, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 4, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 5, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 6, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 7, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 8, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 9, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 10, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 11, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 12, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 13, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 14, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 15, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 16, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 17, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 18, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 19, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 20, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 21, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 22, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 23, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 24, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 25, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 26, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 27, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 28, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 29, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 30, 2026 - In stock Cloud Break Optics - $3,248.00 - Oct 31, 2026 - In stock Cloud Break Optics - $3,248.00 - Nov 1, 2026 - In stock Cloud Break Optics - $3,248.00 - Nov 2, 2026 - In stock Cloud Break Optics - $3,248.00 - Nov 3, 2026 - In stock Cloud Break Optics - $3,248.00 - Nov 4, 2026 - In stock