---
product_id: 357041986
title: "Astromania Bahtinov Mask Focusing Mask for Telescopes - FM60mm for a tube outer diameter (OD) from 65mm-100mm - can be mounted with the brass screws inside or outside the drawtube"
brand: "astromania"
price: "VT9392"
currency: VUV
in_stock: true
reviews_count: 1
category: "Astromania"
url: https://www.desertcart.vu/products/357041986-astromania-bahtinov-mask-focusing-mask-for-telescopes-fm60mm-for-tube
store_origin: VU
region: Vanuatu
---

# Adjustable fit for 65-100mm tubes Precision laser-cut 2mm plexiglass Non-scratch silicon sleeve mounts Astromania Bahtinov Mask Focusing Mask for Telescopes - FM60mm for a tube outer diameter (OD) from 65mm-100mm - can be mounted with the brass screws inside or outside the drawtube

**Brand:** astromania
**Price:** VT9392
**Availability:** ✅ In Stock

## Summary

> 🌟 Focus like a pro, see like never before!

## Quick Answers

- **What is this?** Astromania Bahtinov Mask Focusing Mask for Telescopes - FM60mm for a tube outer diameter (OD) from 65mm-100mm - can be mounted with the brass screws inside or outside the drawtube by astromania
- **How much does it cost?** VT9392 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/357041986-astromania-bahtinov-mask-focusing-mask-for-telescopes-fm60mm-for-tube)

## Best For

- astromania enthusiasts

## Why This Product

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

## Key Features

- • **Durable & Cold-Resistant:** Crafted from reinforced laser-cut plexiglass that stays stiff and reliable even in freezing conditions—built to last your stargazing adventures.
- • **Pinpoint Focus Every Time:** Achieve razor-sharp telescope focus with a mathematically precise diffraction pattern—no guesswork, just perfect clarity.
- • **Gentle Yet Secure Mounting:** Three metal posts with soft silicon sleeves protect your telescope’s finish while keeping the mask perfectly centered and slip-free.
- • **Optimized for Imaging & Visual Use:** Ideal for DSLR, CCD, webcam, or visual observation—speed up your setup and never miss a moment of cosmic brilliance.
- • **Universal Fit, Maximum Versatility:** Adjustable design fits tubes from 65mm to 100mm OD, compatible with reflectors and refractors alike—one mask to rule them all.

## Overview

The Astromania Bahtinov Mask FM60mm is a precision laser-cut focusing tool designed for telescopes with tube diameters between 65mm and 100mm. Featuring a durable 2mm plexiglass construction and adjustable three-post mounting with silicon sleeves, it ensures a secure, non-damaging fit that remains perfectly centered. Compatible with all telescope types and focal lengths, this mask delivers mathematically precise diffraction patterns for quick, accurate focusing—ideal for both visual astronomy and astrophotography.

## Description

The Bahtinov mask has become the preferred method of focusing a telescope, either visually or when imaging with a CCD camera, DSLR or webcam.They are an inexpensive tool which will allow you to achieve pin-sharp levels of focus, saving you time and improving your work. Simply place the mask over the front of your ‘scope, align the scope towards a star. The mask displays a unique diffraction profile; one part of the diffraction pattern moves in response to changes in focus and displays error as a displacement from a clearly defined point.Whether you’re doing planetary visual observing, planetary imaging,or deep sky imaging, the Bahtinov Mask is a great accessory to get the best focus for your telescope quickly and easily.These high quality Bahtinov masks are adjustable to fit a wide range of optical tubes, unlike masks which are only able to fit one telescope.The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect you valued telescope surface. This prevents slippage, whilst allowing the mask to remaining perfectly central. Because of this 3-post mounting, the mask remains centered, whilst fitting a wider range of telescopes.There is a myth about different Bahtinov grating pattern is required for different focal length telescopes. There is no real practical reason for the use of special patterns for different telescope types and focal lengths. In fact, the frequency and angle of Bahtinov mask patterns aren’t really that important. The diffraction effect is so sensitive to changes in focus, that the results are excellent regardless. Please be assured that these focusing masks will work excellently for both reflectors and refractors with whatever focal length. All you need to do is to measure your telescope tube size and choose the right size of the mask.

Review: جيد - نعم جيد لكنه هـش .. بلاستيك سريع الكسر

## Features

- Bahtinov masks take the guesswork out of focusing and even get over the seeing conditions as it is a mathematical type approach to the task; the best focus for your telescope quickly and easily
- Suitable for use on all types of telescope; they are made from precision laser cut enforced plexiglass that is stiff and long lasting; they will never be brittle in the cold; unlike some other masks which are made from normal plastics
- The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect valued telescope surface; mask remains centered since 3-post mounting; while fitting a wider range of telescopes
- Made from 2mm thick laser cut plexiglass and securing screws are capped with soft plastic so that do not damage telescope; They have adjustment latitude of about 65-100mm that adjustable to fit optical tubes unlike masks which only fit one telescope
- Please be assured these focusing masks will work excellently for both reflectors and refractors with whatever focal length; all you need to do is to measure telescope tube size and choose right size of mask contact us if not sure where to measure

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MEG5D8W |
| Additional Features | Bahtinov Mask |
| Age Range Description | Adult |
| Best Sellers Rank | #74,456 in Electronics ( See Top 100 in Electronics ) #163 in Telescope Accessories |
| Brand | Astromania |
| Coating | Uncoated |
| Compatible Devices | Camera, DSLR, Webcam |
| Customer Reviews | 4.4 out of 5 stars 650 Reviews |
| Exit Pupil Diameter | 3 Millimeters |
| Eye Piece Lens Description | NO |
| Eye piece lens description | NO |
| Focus Type | Center Focus |
| Focus type | Center Focus |
| Item Weight | 1.1 Ounces |
| Item weight | 1.1 Ounces |
| Manufacturer | Astromania |
| Manufacturer Part Number | SKU_AM_BFM60 |
| Model Number | SKU_AM_BFM60 |
| Mount | Equatorial Mount |
| Objective Lens Diameter | 100 Millimeters |
| Objective lens diameter | 100 Millimeters |
| Telescope mount description | Equatorial Mount |

## Product Details

- **Brand:** Astromania
- **Compatible Devices:** Camera, DSLR, Webcam
- **Exit Pupil:** 3 Millimeters
- **Eye Piece Lens Description:** NO
- **Focus Type:** Center Focus
- **Item Weight:** 1.1 Ounces
- **Lens Coating Description:** UV-Protective, Scratch-Resistant
- **Objective Lens Diameter:** 100 Millimeters
- **Optical Tube Length:** 60 Millimeters
- **Telescope Mount Description:** Equatorial Mount

## Images

![Astromania Bahtinov Mask Focusing Mask for Telescopes - FM60mm for a tube outer diameter (OD) from 65mm-100mm - can be mounted with the brass screws inside or outside the drawtube - Image 1](https://m.media-amazon.com/images/I/618gIyeZNML.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐ جيد
*by A***D on 3 October 2025*

نعم جيد لكنه هـش .. بلاستيك سريع الكسر

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-09*