---
product_id: 158572866
title: "HAMO Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 95mm -140mm (3.74inch - 5.50inch) - For 100mm,120mm Skywatcher Refractors, Celestron 4 SE Etc"
brand: "hamo"
price: "1139965₫"
currency: VND
in_stock: false
category: "Photo"
url: https://www.desertcart.vn/products/158572866-hamo-bahtinov-focusing-mask-for-telescopes-dew-shield-diameter-from
store_origin: VN
region: Vietnam
---

# HAMO Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 95mm -140mm (3.74inch - 5.50inch) - For 100mm,120mm Skywatcher Refractors, Celestron 4 SE Etc

**Brand:** hamo
**Price:** 1139965₫
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** HAMO Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 95mm -140mm (3.74inch - 5.50inch) - For 100mm,120mm Skywatcher Refractors, Celestron 4 SE Etc by hamo
- **How much does it cost?** 1139965₫ with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/158572866-hamo-bahtinov-focusing-mask-for-telescopes-dew-shield-diameter-from)

## Best For

- hamo enthusiasts

## Why This Product

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

## Description

Colour Name:100mm
            
          
          
        
      
    
  


        
        
     
	       
     

     
                              
     
       
        
         
        
        	
        	
        		
        			About Bahtinov mask  The Bahtinov mask is a device used to focus small astronomical telescopes accurately. It was invented by Russian amateur astrophotographer Pavel Bahtinov in 2008. Accurate focusing of telescopes and astrographs is particularly of concern to those involved in astrophotography. The telescope is pointed at a bright star, and a mask is placed in front of the telescope's objective (e.g. primary mirror).   How does it work?  Set up your telescope and imaging equipment as normal. Then simply locate a bright star (maybe Spica?) with your telescope, attach the Bahtinov mask to your telescope and watch the diffraction spike pattern around the star as you adjust the focus. When the middle diffraction spike is centered in the outer spikes, you're in focus. Very little focusing travel is required to move the inner diffraction spike, which means the focus is extremely accurate.   Program type Suitable for telescopes Dew Shield or Front Outer Diameter From 95mm -140mm (3.74inch - 5.50inch) - For 100mm,120mm Skywatcher Refractors, Celestron 4 SE Etc.   Package Include:  Bahtinov Mask  3 X Brass bolt

## Features

- Suitable for telescopes Dew Shield or Front Outer Diameter From 95mm -140mm (3.74inch - 5.50inch) - For 100mm,120mm Skywatcher Refractors, Celestron 4 SE Etc.
- Bahtinov masks make focusing for astrophotography an easy task. Watch the two slanted areas create an "X" over the star. The vertical slits create a moving bar that is centered on the X when you are at focus.
- The mask attaches securely to your scope using brass screws with soft transparent nylon cover to ensure the finish of your telescope is protected.
- Light weight so you wont upset the balance on your scope. It will take less time to achieve perfect focus with your new mask which mean you spend more time imaging photons rather than focusing them.

## Images

![HAMO Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 95mm -140mm (3.74inch - 5.50inch) - For 100mm,120mm Skywatcher Refractors, Celestron 4 SE Etc - Image 1](https://images-na.ssl-images-amazon.com/images/I/51xb29c6LGL.jpg)
![HAMO Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 95mm -140mm (3.74inch - 5.50inch) - For 100mm,120mm Skywatcher Refractors, Celestron 4 SE Etc - Image 2](https://images-na.ssl-images-amazon.com/images/I/51WAumUHunL.jpg)
![HAMO Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 95mm -140mm (3.74inch - 5.50inch) - For 100mm,120mm Skywatcher Refractors, Celestron 4 SE Etc - Image 3](https://images-na.ssl-images-amazon.com/images/I/31SE%2BJfJrOL.jpg)
![HAMO Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 95mm -140mm (3.74inch - 5.50inch) - For 100mm,120mm Skywatcher Refractors, Celestron 4 SE Etc - Image 4](https://images-na.ssl-images-amazon.com/images/I/31S8axkV%2BgL.jpg)
![HAMO Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 95mm -140mm (3.74inch - 5.50inch) - For 100mm,120mm Skywatcher Refractors, Celestron 4 SE Etc - Image 5](https://images-na.ssl-images-amazon.com/images/I/51ymIgOiGNL.jpg)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-05-19*