---
product_id: 99975109
title: "Orion 8893 Field Flattener for Short Refractors"
brand: "orion"
price: "$12.68"
currency: USD
in_stock: false
url: https://www.desertcart.ec/products/99975109-orion-8893-field-flattener-for-short-refractors
store_origin: EC
region: Ecuador
---

# 55mm backfocus for 2" focusers 400-660mm focal length range Interchangeable M42 & M48 adapters Orion 8893 Field Flattener for Short Refractors

**Brand:** orion
**Price:** $12.68
**Availability:** ❌ Out of Stock

## Summary

> 🔭 Elevate your astrophotography—capture the cosmos in flawless focus!

## Quick Answers

- **What is this?** Orion 8893 Field Flattener for Short Refractors by orion
- **How much does it cost?** $12.68 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/99975109-orion-8893-field-flattener-for-short-refractors)

## 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

- • **Sharper Stars, Every Time:** Eliminates field curvature for crisp, edge-to-edge star images
- • **Seamless Camera Integration:** Includes versatile M42 and M48 thread-on adapters for effortless DSLR or mirrorless connection
- • **Tailored for Fast Refractors:** Optimized for f/5 to f/7.5 focal ratios, perfect for short, optically fast scopes
- • **Ready for Professional Setups:** Compatible with 2" focusers and requires just 55mm backfocus for easy installation
- • **True Focal Length Preservation:** Maintains your telescope’s native focal length while flattening the field of view

## Overview

The Orion 8893 Field Flattener is engineered to eliminate field curvature in short, fast refractor telescopes (400-660mm focal length, f/5 to f/7.5), delivering sharper stars across the entire field. It features interchangeable M42 and M48 camera adapters for versatile imaging setups, preserves the telescope’s focal length, and fits 2" focusers with a 55mm backfocus requirement, making it an essential upgrade for serious astrophotographers.

## Description

Optically fast refractor telescopes used for astrophotography are often plagued by significant field curvature, which is especially noticeable when using CCD/CMOS imagers and DSLRs with APS-C sized and full-frame sensors. This manifests in stars that are out of focus on the periphery of the image frame. Orion's handy field flattener solves this problem by providing excellent field correction while preserving the focal length attributes of your telescope. With the field flattener, stars will appear in sharp focus across the entire frame. Designed for use with refractors with focal lengths of 400mm to 660mm and focal ratios of f/5 to f/7.5, the Orion Field Flattener for Short Refractors lets you enjoy the full imaging potential of your fast refractor telescope. Fully multi-coated, 38mm clear aperture optics and a glare-reducing threaded interior ensure maximum image contrast. We've upgraded the design of the Orion Field Flattener for Short Refractors to accommodate interchangeable thread-on camera adapters. And now we include both male M42 (standard T thread) and M48 (wide T thread) camera adapters (previously included only M42 adapter). The M48 adapter is recommended for use with full-frame camera sensors. Depending on which adapter you use, you will need the corresponding T-ring (M42 or M48) for your specific camera model (sold separately).Both the M42 and M48 adapters come with a thread-on aluminum cap. The Orion Field Flattener for Short Refractors has fully multi-coated 2-element optics and a clear aperture of 38mm. It is compatible with 2" focuser drawtubes and its barrel is conveniently threaded for use with 2" filters. Backfocus distance of 55mm is required to achieve proper focus. This flattener is for photographic use only. Weighs 7.5 oz.

## Features

- Eliminates field curvature in short, optically fast refractor telescopes, for sharper stars Designed for use with 400mm to 660mm focal length refractors with f/5 to f/7.5 focal ratios Now includes interchangeable male M42 and M48 "wide" thread-on camera adapters (T-ring for your camera sold separately) Preserves focal length attributes of the attached refractor telescope while flattening the field of view Compatible with 2" focusers and requires 55mm of backfocus

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Package Dimensions L x W x H | 14.7 x 7.9 x 6.9 centimetres |
| Package Weight | 295 g |
| Product Dimensions L x W x H | 14.3 x 7 x 7 centimetres |
| Item Weight | 7.5 Ounces |
| Brand | Orion |
| Max Focal Length | 650 Millimetres |
| Objective Lens Diameter | 55 Millimetres |
| Part number | 8893 |
| Focus type | Manual Focus |
| Guaranteed software updates until | unknown |

## Product Details

- **Brand:** Orion
- **Optical tube length:** 660 Millimetres
- **Eye piece lens description:** Field
- **Objective lens diameter:** 55 Millimetres
- **Focus type:** Manual Focus
- **Finderscope:** Reflex
- **Item weight:** 7.5 Ounces
- **Compatible devices:** Camera
- **Lens coating description:** Fully Multi-Coated
- **Focal length description:** 660 millimeters

## Images

![Orion 8893 Field Flattener for Short Refractors - Image 1](https://m.media-amazon.com/images/I/61f5dLOsH6L.jpg)
![Orion 8893 Field Flattener for Short Refractors - Image 2](https://m.media-amazon.com/images/I/51wIG1MqHSL.jpg)
![Orion 8893 Field Flattener for Short Refractors - Image 3](https://m.media-amazon.com/images/I/6139ocjv-mL.jpg)
![Orion 8893 Field Flattener for Short Refractors - Image 4](https://m.media-amazon.com/images/I/71neeWazrnL.jpg)

## Questions & Answers

**Q: I have the orion eon 85mm ed-x2, is this the recomended flattener for it?**
A: The Orion Field Flattener for short refractors is designed for Refractors between F5 to F7.5 and your EON 85mm is F6.6, so it should work fine, though I don't know if there is a field flattener that is "recommended" by Orion.

**Q: Maybe i didn't ask this right. the 8893 fits my camera ok but not my telescope with 1.25" focuser threads. please, a link to an adapter that works? tu**
A: If  your scope is only 1.25" than yes you would need adapter.

**Q: Can this be used with an orion apo doublet ed80 that has a 600mm fl at f/7.5? i'm planning on connecting a canon eos 70d onto it with a t-ring.**
A: Yes

**Q: This is good for the orion astroview 120st?**
A: This flattener is intended for refractors with short focal length, I don't remember but I think is up to 650mm focal length, I am using it with the Orion EDT80CF and works perfectly, I think as long as your telescope is within the focal length it should work, I will recommend you to look in orion web page and look for the specifications. I strongly recommend this flattener, also keep in mind that you will need the spacer rings, there is a set in orion web page as well,  it is indispensable for CCD cameras , I think for DSLR are not required.Good luck and clear skies

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-01-29*