---
product_id: 537441050
title: "Explore Scientific Field Flattener for Refractor Telescopes with Focal Ratio of f/5 to f7 for Astrophotography"
brand: "explore scientific"
price: "$260.95"
currency: USD
in_stock: true
reviews_count: 3
category: "Explore Scientific"
url: https://www.desertcart.us/products/537441050-explore-scientific-field-flattener-for-refractor-telescopes-with-focal-ratio
store_origin: US
region: United States of America
---

# Minimizes star distortion Optimized for f/5 to f/7 refractors Secure T-ring camera attachment Explore Scientific Field Flattener for Refractor Telescopes with Focal Ratio of f/5 to f7 for Astrophotography

**Brand:** explore scientific
**Price:** $260.95
**Availability:** ✅ In Stock

## Summary

> 🌠 Capture the cosmos in perfect focus — don’t let your stars blur out!

## Quick Answers

- **What is this?** Explore Scientific Field Flattener for Refractor Telescopes with Focal Ratio of f/5 to f7 for Astrophotography by explore scientific
- **How much does it cost?** $260.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/537441050-explore-scientific-field-flattener-for-refractor-telescopes-with-focal-ratio)

## Best For

- explore scientific enthusiasts

## Why This Product

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

## Key Features

- • **Trusted USA Support:** Backed by dedicated customer service from Explore Scientific in Arkansas.
- • **Fully Multi-Coated Optics:** Maximizes light transmission for stunning contrast in every astrophotograph.
- • **Precision 55mm Sensor Spacing:** Optimized spacing ensures perfect focus and sharpness on your camera sensor.
- • **Pinpoint Stars Across the Frame:** Eliminates field curvature for crisp, round stars from edge to edge.
- • **Tailored for f/5 to f/7 Refractors:** Engineered specifically to match your telescope’s focal ratio for flawless imaging.

## Overview

The Explore Scientific Field Flattener is a precision optical accessory designed for refractor telescopes with focal ratios between f/5 and f/7. It corrects field curvature to deliver sharp, distortion-free star images across the entire frame, making it ideal for serious astrophotographers. Featuring fully multi-coated optics and a secure T-ring camera mount, it ensures maximum light transmission and easy integration with your imaging setup. Supported by US-based customer service, this field flattener is a must-have for capturing breathtaking celestial photos.

## Description

desertcart.com : Explore Scientific Field Flattener for Refractor Telescopes with Focal Ratio of f/5 to f7 for Astrophotography : Electronics

Review: Works flawlessly - It feels really well built, and seems to work as advertised. I'm yet to use it in a long session, but I've taken some test pictures through my F/6.5 refractor, and I get round stars across the entire field of view, at least on an APS-C sensor. I'm quite happy with it!
Review: Explore Scientific Field Flattener for Refractor Scope - Explore Scientific Field Flattener is Fabulous This is one of several purchased from desertcart. The work extremely well with my telescopes and cameras in flattening the image plane of my cameras. Highly recommended in f:5-f:7 systems as advertised!

## Features

- MINIMIZES STAR DISTORTION IN ASTROPHOTOGRAPHY: When placed between your telescope and camera, the Explore Scientific field flattener counters the negative effects of field curvature, which causes stars to appear smeared as you move away from the center of the image.
- WORKS WITH FOCAL RATIOS OF F/5 TO F/7: This field flattener is designed specifically for astrophotography using refractor-type telescopes with focal ratios of f/5 to f/7 and requires 55mm (+/- 2mm) of spacing between the back of the device and the camera sensor.
- DESIGNED FOR A SECURE CONNECTION: The field flattener has a T-ring thread to easily attach a camera using a user-supplied T-ring.
- FULLY MULTI-COATED OPTICS: The optical glass is fully multi-coated to maximize light transmission and produce high-contrast astrophotographs of planets, nebulae, galaxies, star clusters and other night sky sights.
- USA SUPPORT: Based in Springdale, Arkansas, USA, you can always be assured of excellent customer service should you ever have an issue or question.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BTMVPT3T |
| Additional Features | Designed for specific focal ratios and camera sensor spacing for astrophotography with refractor telescopes |
| Best Sellers Rank | #342 in Telescope Photo Adapters |
| Brand | Explore Scientific |
| Coating | Fully Multi-Coated |
| Compatible Devices | DAR1020765-01, DAR127065-02, DAR152065-01, ES-ED0806-02, ES-ED10207-02, FCD100-0806-01, FCD100-10207-02 |
| Customer Reviews | 4.7 out of 5 stars 11 Reviews |
| Eye Piece Lens Description | Fully multi-coated refractor optical design |
| Field Of View | 1.86 degrees |
| Finderscope | Reflex |
| Focal Length Description | The focal length remains unchanged |
| Focus Type | Manual Focus |
| Item Dimensions D x W x H | 2"D x 2"W x 4"H |
| Manufacturer | Explore Scientific |
| Manufacturer Part Number | ES-FF2F5/F7 |
| Model Name | FFEDAPO-01 |
| Model Number | ES-FF2F5/F7 |
| Mount | Refracting telescope mount, compatible with f/5 to f/7 refractors |
| Product Dimensions | 2"D x 2"W x 4"H |
| Telescope Mount Description | Refracting telescope mount, compatible with f/5 to f/7 refractors |
| UPC | 811803034297 |
| Unit Count | 1 Count |
| Warranty Description | Limited USA One Year Warranty when product is registered within 60 days of purchase. |

## Images

![Explore Scientific Field Flattener for Refractor Telescopes with Focal Ratio of f/5 to f7 for Astrophotography - Image 1](https://m.media-amazon.com/images/I/515HZR84w1L.jpg)
![Explore Scientific Field Flattener for Refractor Telescopes with Focal Ratio of f/5 to f7 for Astrophotography - Image 2](https://m.media-amazon.com/images/I/61yCThfEJ5L.jpg)
![Explore Scientific Field Flattener for Refractor Telescopes with Focal Ratio of f/5 to f7 for Astrophotography - Image 3](https://m.media-amazon.com/images/I/61lGkhPbLWL.jpg)
![Explore Scientific Field Flattener for Refractor Telescopes with Focal Ratio of f/5 to f7 for Astrophotography - Image 4](https://m.media-amazon.com/images/I/61mC82iHYJL.jpg)
![Explore Scientific Field Flattener for Refractor Telescopes with Focal Ratio of f/5 to f7 for Astrophotography - Image 5](https://m.media-amazon.com/images/I/61ovJlxixEL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works flawlessly
*by E***Z on August 24, 2025*

It feels really well built, and seems to work as advertised. I'm yet to use it in a long session, but I've taken some test pictures through my F/6.5 refractor, and I get round stars across the entire field of view, at least on an APS-C sensor. I'm quite happy with it!

### ⭐⭐⭐⭐⭐ Explore Scientific Field Flattener for Refractor Scope
*by B***B on May 22, 2025*

Explore Scientific Field Flattener is Fabulous This is one of several purchased from Amazon. The work extremely well with my telescopes and cameras in flattening the image plane of my cameras. Highly recommended in f:5-f:7 systems as advertised!

### ⭐⭐⭐⭐⭐ Well built and easy to use
*by P***K on November 26, 2023*

Provides a nice flat field for my svbony 102mm scope. I wanted this because the flattener they provide is also a reducer. I have both and use them both for their specific situations. Other than the field of view, there is no discernible difference between the performance of this and the flattener designed specifically for the f7 scope.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-20*