---
product_id: 69881829
title: "Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter from 105mm -148mm"
brand: "william optics"
price: "£58.99"
currency: GBP
in_stock: true
category: "Electronics"
url: https://www.desertcart.co.uk/products/69881829-diffraction-spikes-bahtinov-focusing-mask-for-telescopes-dew-shield-diameter
store_origin: GB
region: United Kingdom
---

# Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter from 105mm -148mm

**Brand:** william optics
**Price:** £58.99
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter from 105mm -148mm by william optics
- **How much does it cost?** £58.99 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/69881829-diffraction-spikes-bahtinov-focusing-mask-for-telescopes-dew-shield-diameter)

## Best For

- william optics enthusiasts

## Why This Product

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

## Description

William Optics Diffraction Spikes is an ultra high optical transmission Bahtinov mask which produces the clearest, brightest and longest diffraction spikes facilitating focusing with ease and accuracy.

## Features

- Optical transmission: 92% and above
- Made with optical grade PMMA material
- Easy to mount on 3" – 4.2" refractor telescope

## Images

![Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter from 105mm -148mm - Image 1](https://m.media-amazon.com/images/I/41Mda8lmXNL.jpg)
![Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter from 105mm -148mm - Image 2](https://m.media-amazon.com/images/I/5100vGWOa3L.jpg)
![Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter from 105mm -148mm - Image 3](https://m.media-amazon.com/images/I/314olnohPgL.jpg)
![Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter from 105mm -148mm - Image 4](https://m.media-amazon.com/images/I/61sccZRIMpL.jpg)
![Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter from 105mm -148mm - Image 5](https://m.media-amazon.com/images/I/416DA2JWXJL.jpg)

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**Shop now:** [https://www.desertcart.co.uk/products/69881829-diffraction-spikes-bahtinov-focusing-mask-for-telescopes-dew-shield-diameter](https://www.desertcart.co.uk/products/69881829-diffraction-spikes-bahtinov-focusing-mask-for-telescopes-dew-shield-diameter)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-26*