---
product_id: 462744471
title: "Diameter 114 mm Focal Length 900mm Newtonian Reflector Mirror for Astronomical"
brand: "skyoptikst"
price: "$108"
currency: NZD
in_stock: true
reviews_count: 13
category: "Skyoptikst"
url: https://www.desertcart.nz/products/462744471-diameter-114-mm-focal-length-900mm-newtonian-reflector-mirror-astronomical
store_origin: NZ
region: New Zealand
---

# 92% reflectance with enhanced coating 900mm focal length for sharp focus 114mm aperture for crisp views Diameter 114 mm Focal Length 900mm Newtonian Reflector Mirror for Astronomical

**Brand:** skyoptikst
**Price:** $108
**Availability:** ✅ In Stock

## Summary

> 🔭 Unlock the Universe: See More, Build Better, Belong to the Star-Gazing Elite!

## Quick Answers

- **What is this?** Diameter 114 mm Focal Length 900mm Newtonian Reflector Mirror for Astronomical by skyoptikst
- **How much does it cost?** $108 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/462744471-diameter-114-mm-focal-length-900mm-newtonian-reflector-mirror-astronomical)

## Best For

- skyoptikst enthusiasts

## Why This Product

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

## Key Features

- • **Superior Reflective Coating:** Enhanced aluminum coating boosts reflectance to 92% across 400-950nm wavelengths for vivid observations.
- • **Precision Optics for Stellar Clarity:** 114mm diameter mirror delivers bright, detailed celestial images.
- • **DIY-Ready for Custom Telescope Builds:** Perfect for 3D printed or handcrafted Newtonian telescopes—join the maker movement!
- • **Trusted Quality with Proven Performance:** Highly rated with 4.8 stars and praised for near-perfect surface accuracy (1/10 λ).
- • **Long Focal Length for Deep Space Exploration:** 900mm focal length ensures sharp, high-contrast views of planets and the moon.

## Overview

The Skyoptikst 114mm Newtonian Reflector Mirror features a precise 114mm aperture and a 900mm focal length, optimized with a 92% reflective enhanced aluminum coating. Designed for DIY telescope enthusiasts, it offers exceptional surface accuracy (1/10 λ) and reliable performance, making it a top choice for amateur astronomers seeking crisp, detailed views of the night sky.

## Description

desertcart.com : Skyoptikst Diameter 114 mm Focal Length 900mm Newtonian Reflector Mirror for Astronomical : Electronics

Review: Great for DIY Newtonian telescopes - Perfect for a fun project telescope. I bought 3 of these sets, one for my Dad, one for my youngest son, and one for myself. We used them in 114mm Hadley telescopes that we 3D printed the majority of the parts for. We have really enjoyed the views that these inexpensive mirrors have provided of the moon, and our planetary neighbors.
Review: The Real Deal - Very good sphere for 30 bucks - I had a bad experience with a different desertcart seller- the ronchi test showed severe zones in the sphere, some of the worst I've ever seen. This mirror is great, with only slight undercorrection and some TDE at the edge- this is time consuming to remove and largely doesn't affect the view, and can easily be masked. In some cases, like this one, it may even be beneficial to have a slight bit of TDE (but it gets complicated). Overall this is a great buy for 30 dollars. Attached is my outside ROC ronchi test of this mirror, Blue, and a perfect ronchi test, black and white. You can be confident in this purchase.

## Features

- Caliber: 114mm, Focal length: 900mm
- Surface accuracy： 1/10 λ
- Enhanced aluminum and protective coating
- Reflectance at: 92% / 400-950nm
- Major axis of secondary mirror: 35mm , minor axis: 25mm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B096F28YR6 |
| Best Sellers Rank | #570 in Camera & Photo Products ( See Top 100 in Camera & Photo Products ) #11 in Telescope Reflectors |
| Customer Reviews | 4.8 4.8 out of 5 stars (53) |
| Date First Available | February 18, 2021 |
| Item Weight | 14.1 ounces |
| Item model number | D114F900JP |
| Manufacturer | Skyoptikst |
| Product Dimensions | 0.39 x 0.39 x 0.39 inches |

## Product Details

- **Brand:** Skyoptikst
- **Eye Piece Lens Description:** Kellner or Plossl
- **Finderscope:** Reflex
- **Focus Type:** Manual Focus
- **Item Weight:** 0.4 Kilograms
- **Model Name:** D114F900JP-FBA
- **Objective Lens Diameter:** 114 Millimeters
- **Power Source:** Battery Powered
- **Product Dimensions:** 8.66"D x 5.9"W x 1.96"H
- **Telescope Mount Description:** Altazimuth Mount

## Images

![Diameter 114 mm Focal Length 900mm Newtonian Reflector Mirror for Astronomical - Image 1](https://m.media-amazon.com/images/I/31CdDoQ586L.jpg)
![Diameter 114 mm Focal Length 900mm Newtonian Reflector Mirror for Astronomical - Image 2](https://m.media-amazon.com/images/I/31rqy+GvxAL.jpg)
![Diameter 114 mm Focal Length 900mm Newtonian Reflector Mirror for Astronomical - Image 3](https://m.media-amazon.com/images/I/41igF3RQxeS.jpg)
![Diameter 114 mm Focal Length 900mm Newtonian Reflector Mirror for Astronomical - Image 4](https://m.media-amazon.com/images/I/51EE+hxVa3S.jpg)
![Diameter 114 mm Focal Length 900mm Newtonian Reflector Mirror for Astronomical - Image 5](https://m.media-amazon.com/images/I/51HM8wL9NzS.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for DIY Newtonian telescopes
*by J***D on November 1, 2025*

Perfect for a fun project telescope. I bought 3 of these sets, one for my Dad, one for my youngest son, and one for myself. We used them in 114mm Hadley telescopes that we 3D printed the majority of the parts for. We have really enjoyed the views that these inexpensive mirrors have provided of the moon, and our planetary neighbors.

### ⭐⭐⭐⭐⭐ The Real Deal - Very good sphere for 30 bucks
*by M***R on January 17, 2024*

I had a bad experience with a different amazon seller- the ronchi test showed severe zones in the sphere, some of the worst I've ever seen. This mirror is great, with only slight undercorrection and some TDE at the edge- this is time consuming to remove and largely doesn't affect the view, and can easily be masked. In some cases, like this one, it may even be beneficial to have a slight bit of TDE (but it gets complicated). Overall this is a great buy for 30 dollars. Attached is my outside ROC ronchi test of this mirror, Blue, and a perfect ronchi test, black and white. You can be confident in this purchase.

### ⭐⭐⭐⭐⭐ Inexpensive yet great quality
*by B***A on March 12, 2025*

I rebuilt an almost free goodwill reflector telescope using these mirrors. They were a perfect fit and an inexpensive way to bring a telescope back into service.

## Frequently Bought Together

- SKYOPTIKST D114F900 Newtonian Reflector telescoe Mirror，DIY 114/900 Astronomical Telescopes
- SVBONY 25mm Telescope Eyepiece, Large Aperture Eyepiece, 40 Degree Field of View Plossl Eyepiece with Filter Threaded for Observing Moon Planetary Binary
- SVBONY Telescope Eyepiece Fully Mutil Coated 1.25 inches Telescope Accessories Set 66 Degree Ultra Wide Angle HD 6mm for Astronomy Telescope

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**Shop now:** [https://www.desertcart.nz/products/462744471-diameter-114-mm-focal-length-900mm-newtonian-reflector-mirror-astronomical](https://www.desertcart.nz/products/462744471-diameter-114-mm-focal-length-900mm-newtonian-reflector-mirror-astronomical)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-17*