---
product_id: 440458
title: "Orion 05531 Thin Off-Axis Guider for Astrophotography (Black)"
brand: "orion"
price: "€ 349.86"
currency: EUR
in_stock: true
reviews_count: 13
url: https://www.desertcart.ie/products/440458-orion-05531-thin-off-axis-guider-for-astrophotography-black
store_origin: IE
region: Ireland
---

# 10.5mm ultra-thin profile Simultaneous DSLR & guide camera capture Off-axis guiding for Newtonian reflectors Orion 05531 Thin Off-Axis Guider for Astrophotography (Black)

**Brand:** orion
**Price:** € 349.86
**Availability:** ✅ In Stock

## Summary

> 🌌 Capture the cosmos with precision and style—thin, sleek, and built for the serious stargazer!

## Quick Answers

- **What is this?** Orion 05531 Thin Off-Axis Guider for Astrophotography (Black) by orion
- **How much does it cost?** € 349.86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/440458-orion-05531-thin-off-axis-guider-for-astrophotography-black)

## Best For

- orion enthusiasts

## Why This Product

- Trusted orion brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ultra-Thin 10.5mm Design:** Engineered for Newtonian reflectors with limited back focus, ensuring perfect fit without compromising your setup.
- • **Coma Corrector Compatible:** Maintains flawless image quality by not interfering with coma correctors—because every pixel counts.
- • **Flexure Compensation for Precision:** Built-in flexure correction guarantees rock-solid guiding and tracking, so your stars stay sharp and steady.
- • **Seamless Dual-Camera Astrophotography:** Guide and shoot through one telescope—ditch the bulky guide scope and elevate your night sky game.
- • **Customizable Fit with Spacer Flexibility:** Adapt easily to your DSLR and guiding camera combo with adjustable spacers—fine-tune your astrophotography rig like a pro.

## Overview

The Orion 05531 Thin Off-Axis Guider is a precision astrophotography accessory designed for Newtonian reflector telescopes and DSLR cameras. Its ultra-thin 10.5mm profile allows for seamless integration without sacrificing back focus, while enabling simultaneous guiding and imaging through a single telescope. Compatible with coma correctors and equipped to compensate for flexures, it ensures accurate tracking and sharp astrophotos. Lightweight and customizable with spacers, it’s a must-have for millennial pros seeking to elevate their night sky captures.

## Description

desertcart.com : Orion 05531 Thin Off-Axis Guider for Astrophotography (Black) : Telescope Guiders : Electronics

Review: Very good - I am using this OAG with a Canon 450D and a Meade DSI Pro monochrome camera as guider on Megrez 72 and also on C8. It focuses on both scopes perfectly and on top of that it also comes into focus with Televue TRF-2008 flattener / reducer when used with C8. I did not notice any vignetting. If you are not able to find the focus, just play with different combinations of extension rings and eventually you will find the right combination.
Review: Great product with some prior planning and upgrades from the Hardware store - This is a great product. Of note, you'll need a few things to make it work for you. The manual will only tell you that the two cameras need to be equi-distant. That's great, but you really need to know the length of the stalk to the guiding CCD chip and then get appropriate spacers for your primary CCD. The 'prism to the 'c-mount' is roughly 1.5 inches. Now, you'll need to figure out from there what spacers you need based on your particular camera setup (and the spacers required) so you can make this work. If you're using a DSLR of some type, you might actually have the right spacer with it to make it work. But, as always, do the math and double check it. Second, the set screws on this thing are flimsy! I took it with me to a hardware store and purchased multiple (2 required) 4-40 x 3/8" socket head screws. Just undo the set screws for the 'stalk' and replace them with this. It'll let you screw them down significantly more and keep it stable. Otherwise, once you get the spacing correct and the set screws replaced, this thing is actually a very good OAG.

## Features

- Delightfully thin off-axis guider ideal for use with Newtonian reflector telescopes and DSLR cameras
- Lets you guide and capture astrophotos simultaneously through one telescope. No guide scope required!
- 10.5mm thickness perfect for use with Newtonian reflectors which have limited back focus travel
- Will not interfere with the use of coma correctors thanks to its thin profile
- Compensates for any existing flexures that may interfere with accurate guiding and tracking

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00E4F36AS |
| Best Sellers Rank | #144 in Telescope Guiders & Wedges |
| Customer Reviews | 3.7 3.7 out of 5 stars (37) |
| Date First Available | November 1, 2003 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4.4 ounces |
| Item model number | 5531 |
| Manufacturer | Optronic Technologies, Inc |
| Product Dimensions | 3 x 1.75 x 3.5 inches |

## Product Details

- **Brand:** Orion
- **Compatible Devices:** Newtonian reflector telescopes, DSLR cameras from Orion
- **Finderscope:** Reflex
- **Focus Type:** Manual Focus
- **Global Trade Identification Number:** 00759270055318
- **Item Weight:** 4.4 ounces
- **Lens Coating Description:** StarBright XLT
- **Model Name:** OR-05531
- **Product Dimensions:** 0.41"D x 0.41"W x 0.41"H
- **Telescope Mount Description:** Altazimuth Mount

## Images

![Orion 05531 Thin Off-Axis Guider for Astrophotography (Black) - Image 1](https://m.media-amazon.com/images/I/71GcfPjCGlL.jpg)
![Orion 05531 Thin Off-Axis Guider for Astrophotography (Black) - Image 2](https://m.media-amazon.com/images/I/71RLmsZgZbL.jpg)
![Orion 05531 Thin Off-Axis Guider for Astrophotography (Black) - Image 3](https://m.media-amazon.com/images/I/71JklOuPMiL.jpg)
![Orion 05531 Thin Off-Axis Guider for Astrophotography (Black) - Image 4](https://m.media-amazon.com/images/I/71tewnmRS3L.jpg)
![Orion 05531 Thin Off-Axis Guider for Astrophotography (Black) - Image 5](https://m.media-amazon.com/images/I/818bLRTutYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good
*by O***T on February 5, 2014*

I am using this OAG with a Canon 450D and a Meade DSI Pro monochrome camera as guider on Megrez 72 and also on C8. It focuses on both scopes perfectly and on top of that it also comes into focus with Televue TRF-2008 flattener / reducer when used with C8. I did not notice any vignetting. If you are not able to find the focus, just play with different combinations of extension rings and eventually you will find the right combination.

### ⭐⭐⭐⭐ Great product with some prior planning and upgrades from the Hardware store
*by C***N on December 6, 2013*

This is a great product. Of note, you'll need a few things to make it work for you. The manual will only tell you that the two cameras need to be equi-distant. That's great, but you really need to know the length of the stalk to the guiding CCD chip and then get appropriate spacers for your primary CCD. The 'prism to the 'c-mount' is roughly 1.5 inches. Now, you'll need to figure out from there what spacers you need based on your particular camera setup (and the spacers required) so you can make this work. If you're using a DSLR of some type, you might actually have the right spacer with it to make it work. But, as always, do the math and double check it. Second, the set screws on this thing are flimsy! I took it with me to a hardware store and purchased multiple (2 required) 4-40 x 3/8" socket head screws. Just undo the set screws for the 'stalk' and replace them with this. It'll let you screw them down significantly more and keep it stable. Otherwise, once you get the spacing correct and the set screws replaced, this thing is actually a very good OAG.

### ⭐⭐⭐ just okay
*by C***X on July 5, 2020*

the prism fell out during the first use and had to be sent for a replacement. the new one works, but some of the craftsmanship could still be better.

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---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-04*