---
title: "Choosing an equatorial mount for your payload"
canonical: https://stackingstarlight.com/buy/mount
description: "The mount matters more than any other purchase in deep-sky imaging — it's what keeps stars round during long exposures. The decision is driven by your **imaging payload** and how/where you'll use it."
---

# Choosing an equatorial mount for your payload

> The mount matters more than any other purchase in deep-sky imaging — it's what keeps stars round during long exposures. The decision is driven by your **imaging payload** and how/where you'll use it.

## 1. Start from payload, not price

Rule of thumb: image at roughly **60–70% of the rated payload** (mounts are rated for visual, not
imaging). A ~6 kg train wants a mount rated ~10 kg or more. Under-mounting a good scope is the most
common and most expensive mistake.

## 2. The options

- **Star tracker:** tiny, portable, for camera-lens and very short scopes. Outgrows quickly.
- **German equatorial (GEM):** the workhorse — counterweights, strong tracking, the most accessories
  and support. Heavier to carry; needs balancing.
- **Strain-wave / harmonic:** little or no counterweight, high payload-to-weight, very portable —
  excellent for travel — but typically relies on guiding and can show more high-frequency error.

| | GEM | Strain-wave |
|---|---|---|
| Portability | Lower (counterweights) | High |
| Guiding required | Often optional at short FL | Usually yes |
| Payload-to-weight | Lower | High |
| Ecosystem/support | Broadest | Growing |

## 3. For a ~6 kg imaging payload

A solid mid GEM rated ~10–13 kg is the safe, well-supported choice; a strain-wave mount of similar
rating wins if portability is your priority and you'll always guide. Either way, choose
**guiding-capable** (ST4 or pulse-guide) — you'll want it.

## 4. Budget tiers (confirm current models)

- *Entry imaging GEM:* ~10 kg class with guiding support.
- *Mid:* ~13 kg class GEM, or a comparable strain-wave for travel.
- Pair it with optics it can carry — see [choosing a telescope](/buy/telescope).

## A heads-up for later

All geared mounts have some reversal play; if tracking lags/jumps on direction changes, it's usually
tunable — see [reducing mechanical play](/troubleshooting/mount-backlash).

---

How the mount works: [what an equatorial mount does](/equipment/eq-mount).

---

Source: [https://stackingstarlight.com/buy/mount](https://stackingstarlight.com/buy/mount) · Part of [Stacking Starlight](https://stackingstarlight.com) by Michael Kalika.

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