---
product_id: 217938192
title: "Astronomical Telescope Accessories D114F900mm with Short-axis Secondary Mirror 25mm, Newton Reflector Spherical Mirror"
brand: "arikit"
price: "$69.88"
currency: USD
in_stock: true
reviews_count: 8
category: "Arikit"
url: https://www.desertcart.us/products/217938192-astronomical-telescope-accessories-d114f900mm-with-short-axis-secondary-mirror-25mm
store_origin: US
region: United States of America
---

# 900mm focal length for sharp planetary shots 114mm aperture for crisp views Aluminum + oxide coating for durable clarity Astronomical Telescope Accessories D114F900mm with Short-axis Secondary Mirror 25mm, Newton Reflector Spherical Mirror

**Brand:** arikit
**Price:** $69.88
**Availability:** ✅ In Stock

## Summary

> 🔭 Unlock the cosmos — see what others only dream of!

## Quick Answers

- **What is this?** Astronomical Telescope Accessories D114F900mm with Short-axis Secondary Mirror 25mm, Newton Reflector Spherical Mirror by arikit
- **How much does it cost?** $69.88 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/217938192-astronomical-telescope-accessories-d114f900mm-with-short-axis-secondary-mirror-25mm)

## Best For

- arikit enthusiasts

## Why This Product

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

## Key Features

- • **Durable Protective Coatings:** Aluminum film and aluminum oxide layers shield optics for long-lasting performance under all conditions.
- • **Versatile Use for Beginners & Pros:** Perfect for adult and children’s telescopes, DIY projects, and astrophotography enthusiasts aiming to capture planets.
- • **Optimized Newtonian Reflector Design:** 900mm focal length paired with a 25mm short-axis secondary mirror ensures sharp, distortion-free images.
- • **Precision Optics for Stellar Clarity:** K9 glass main mirror with 114mm diameter delivers bright, detailed celestial views.
- • **Ready for Realistic Planetary Imaging:** Proven capability to capture detailed lunar craters and planetary features like Jupiter and Saturn.

## Overview

This Astronomical Telescope Accessory features a high-quality 114mm K9 glass main mirror with a 900mm focal length and a 25mm short-axis secondary mirror. Its aluminum and oxide coatings enhance durability and image clarity, making it ideal for both beginner and advanced telescope users. Designed for Newtonian reflector setups, it enables realistic planetary imaging and versatile use in DIY and educational projects.

## Description

1. The company is committed to optical spherical lenses, optical prisms, reflectors, achromatic lenses, cemented lenses, cylindrical lenses, windows and other optical components can be designed according to requirements, providing you with the best products and services is our aim2. The main mirror is made of K9 glass with a diameter of 114mm, and the focal length is about 900mm3. The minor axis (short side diameter) of the secondary mirror is 25mm, spherical mirror, aluminized and protective film4. Suitable for adult telescope, children's telescope, astronomical beginner telescope, children's beginner telescope, children's telescope toy, astronomical telescope, telescope personnel, adult travel telescope5. Based on the feedback from my friends, you can shoot a few planets.6. Independent product packaging brings you a different shopping experience7. This is an attached area for astronomical telescope lovers, you can buy it as you need8. Used as an accessory for astronomical telescopes

Review: Worked great for a DIY telescope - Great value and worked great for my DIY 114 mm "Hadley" Newtonian reflector. Could see craters and features on the moon, as well as Jupiter amd Saturn and their moons. Clarity was good and didn't notice any image defects.
Review: Worked great for Schlieren imaging - I was very happy with the quality of the main mirror. For my daughter's middle school science fair project, I made a Schlieren imaging setup using this mirror on a kinematic adjustable mount I made with plywood and some hardware. Paired with a Canon 5D4 and a 100-400 lens, the results were great for seeing heat waves coming off hands, candle flame gases, butane, carbon dioxide, nail polish remover, etc. Yeah, I know it was my daughter's science fair project, but come on, that's just what dads do. Anyways, thumbs up to the quality of the mirror in this type of usage; didn't get to try the secondary lens.

## Features

- 1. Material: K9 glass
- 2. Model: Main mirror D114F900 with auxiliary mirror 25mm
- 3. Size: The main mirror diameter is 114mm, the focal length is 900mm, and the minor axis of the secondary mirror is 25mm.
- 4. The surface is coated with aluminum film and aluminum oxide protective film
- 5. Realistic shooting effect: can shoot planets

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08C2XPD27 |
| Additional Features | Newton Reflector design, Short-axis secondary mirror |
| Best Sellers Rank | #1,386 in Camera & Photo Products ( See Top 100 in Camera & Photo Products ) #25 in Telescope Reflectors |
| Brand | Arikit |
| Built-In Media | NO |
| Coating | Basic Coated |
| Compatible Devices | Camera |
| Customer Reviews | 4.0 out of 5 stars 95 Reviews |
| Exit Pupil Diameter | 25 millimeters |
| Eye Piece Lens Description | Kellner |
| Field Of View | 1.65 degrees |
| Finderscope | Reflex |
| Focal Length Description | 900 millimeters |
| Focus Type | Manual Focus |
| Item Dimensions D x W x H | 5"D x 0.5"W x 5"H |
| Item Weight | 13.7 ounces |
| Manufacturer | JINGLIANG |
| Manufacturer Part Number | D114F900/25mm |
| Model Name | RM |
| Model Number | D114F900/25mm |
| Mount | Altazimuth Mount |
| Number of Items | 1 |
| Objective Lens Diameter | 25 millimeters |
| Optical Tube Length | 11.4 centimeters |
| Optical-Tube Length | 11.4 centimeters |
| Power Source | Manual Winding |
| Telescope Mount Description | Altazimuth Mount |
| UPC | 762409866570 |
| Warranty Description | 2 |
| Zoom Ratio | 7.98 |

## Product Details

- **Brand:** N /A
- **Eye Piece Lens Description:** Kellner
- **Finderscope:** Reflex
- **Focus Type:** Manual Focus
- **Model Name:** RM
- **Objective Lens Diameter:** 25 Millimeters
- **Optical Tube Length:** 114 Millimeters
- **Power Source:** Manual Winding
- **Product Dimensions:** 5"D x 0.5"W x 5"H
- **Telescope Mount Description:** Altazimuth Mount

## Images

![Astronomical Telescope Accessories D114F900mm with Short-axis Secondary Mirror 25mm, Newton Reflector Spherical Mirror - Image 1](https://m.media-amazon.com/images/I/41hUROocpUL.jpg)

## Questions & Answers

**Q: Is this a parabolic mirror ?**
A: No. Simple spherical mirror.

**Q: Does it come in 10” sets at 40$?**
A: No. 10" mirrors are many hundreds. These are 114mm so about 4.5" or so

**Q: What is the thickness of the primary and secondary?**
A: the primary mirror thickness is 14.2mm, secondary mirror thickness is 4.8mm

**Q: Will it fit a 10” reflector telescope?  That’s all I want to know**
A: It will fit and leave a lot of empty space; this is about the diameter of a DVD

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked great for a DIY telescope
*by D***. on May 3, 2026*

Great value and worked great for my DIY 114 mm "Hadley" Newtonian reflector. Could see craters and features on the moon, as well as Jupiter amd Saturn and their moons. Clarity was good and didn't notice any image defects.

### ⭐⭐⭐⭐⭐ Worked great for Schlieren imaging
*by N***Y on May 22, 2023*

I was very happy with the quality of the main mirror. For my daughter's middle school science fair project, I made a Schlieren imaging setup using this mirror on a kinematic adjustable mount I made with plywood and some hardware. Paired with a Canon 5D4 and a 100-400 lens, the results were great for seeing heat waves coming off hands, candle flame gases, butane, carbon dioxide, nail polish remover, etc. Yeah, I know it was my daughter's science fair project, but come on, that's just what dads do. Anyways, thumbs up to the quality of the mirror in this type of usage; didn't get to try the secondary lens.

### ⭐⭐⭐⭐ Funciona perfecto!
*by M***Y on September 8, 2024*

Funciona muy bien por su precio, aunque no tiene la calidad de un espejo parabólico, no vas a conseguir uno por 25 dólares aprox... Así que es perfecto para tu primer telescopio casero.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-18*