---
product_id: 1891489
title: "Adjustable M42 Lens to Fuji X Adapter, 42mm Screw Mount Lens to X Mount Adapter Compatible with Fujifilm X-Mount X-Pro1 X-Pro2 X-E1 X-E2 X-E3 X-A5 X-M1 X-T1 X-T2 X-T3 X-T10 X-T20 X-T30 X-H1"
brand: "fotasy"
price: "$23.46"
currency: USD
in_stock: true
reviews_count: 10
category: "Fotasy"
url: https://www.desertcart.us/products/1891489-adjustable-m42-lens-to-fuji-x-adapter-42mm-screw-mount
store_origin: US
region: United States of America
---

# Infinity focus for astrophotography 42mm precision screw mount CNC-milled solid metal build Adjustable M42 Lens to Fuji X Adapter, 42mm Screw Mount Lens to X Mount Adapter Compatible with Fujifilm X-Mount X-Pro1 X-Pro2 X-E1 X-E2 X-E3 X-A5 X-M1 X-T1 X-T2 X-T3 X-T10 X-T20 X-T30 X-H1

**Brand:** fotasy
**Price:** $23.46
**Availability:** ✅ In Stock

## Summary

> 🔩 Unlock timeless glass on your Fuji — vintage vibes, modern precision.

## Quick Answers

- **What is this?** Adjustable M42 Lens to Fuji X Adapter, 42mm Screw Mount Lens to X Mount Adapter Compatible with Fujifilm X-Mount X-Pro1 X-Pro2 X-E1 X-E2 X-E3 X-A5 X-M1 X-T1 X-T2 X-T3 X-T10 X-T20 X-T30 X-H1 by fotasy
- **How much does it cost?** $23.46 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/1891489-adjustable-m42-lens-to-fuji-x-adapter-42mm-screw-mount)

## Best For

- fotasy enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Lens Rotation:** Includes hex key for easy lens adjustment and secure fit, letting you customize your setup on the fly.
- • **Precision Infinity Focus:** Guaranteed infinity focus ensures crystal-clear shots, perfect for astrophotography and landscape pros.
- • **Manual Control for Creative Freedom:** Full manual exposure and focus control empowers you to craft every frame your way—no auto distractions.
- • **Durable CNC-Milled Metal Construction:** Robust copper lens mount with a lightweight yet solid design built to last through every shoot.
- • **Universal M42 to Fuji X Compatibility:** Seamlessly mount vintage M42 lenses on all Fujifilm X-mount mirrorless cameras, from X-Pro to X-T series.

## Overview

The Fotasy Adjustable M42 to Fuji X Adapter is a precision-engineered, CNC-milled metal adapter that allows photographers to mount classic 42mm screw-mount M42 lenses onto Fujifilm X-mount mirrorless cameras. It guarantees infinity focus, making it ideal for astrophotography and manual shooting enthusiasts. Designed for durability and creative control, it supports full manual exposure and focus adjustments, with no electronic contacts. Compatible with a wide range of Fujifilm X-series models, this adapter is a must-have for professionals seeking to blend vintage optics with cutting-edge camera bodies.

## Description

This adapter allows M42 42mm Scew Mount Lens to fit on X-mount Mirrorless Digital Cameras.Infinity Focus Guaranteed.There is no electrical contacts in the adapter ring. Exposure and focus has to be adjusted manually. Automatic diaphragm, auto-focusing, or any other functions will not operated with using this adapter.Compatible with Fujifilm X-mount Mirrorless Digital Camera X-Pro1 X-Pro2 X-Pro3 X-E2 X-E3 X-A5 X-A7 X-A10 X-M1 X-T1 X-T2 X-T3 X-T4 X-T10 X-T20 X-T30 X-T30II X-T100 X-H1 and New Models

Review: Works nicely for astrophotography - I have several of these adapters to allow my to use old M42 fixed focal length lenses with my Fuji body for astrophotography. When used with astrophotography, it is important that the lens be able to reach infinity focus, and these adapters meet that requirement. The adapter is made of metal, and includes a small hex key. The hex key allows you to loosen the set screw holding the M42 lens so you can rotate the lens body to whatever position you want.
Review: Well made product! - Recently ordered the Fotasy M42 to Fuji X adapter. Because of the low price, I was initially worried about the build quality, or the fit, but that proved to be completely unnecessary. The quality and fit and is surprisingly good! Excellent even. It is well made and light weight, with steel mounts, so the risk of anything breaking is slim to none. There are no sharp edges and the whole things must have been CNC milled. I see absolutely no reason to ever buy a more expensive band.

## Features

- M42 Mount to Fuji X Mount Adapter, allows M42 42mm Screw Mount Lens to fit on X-Mount Mirrorless Cameras
- Infinity Focus Guaranteed.
- Copper Lens mount, solid and durable
- There is no electrical contacts in the adapter ring. Exposure and focus has to be adjusted manually. Automatic diaphragm, auto-focusing, or any other functions will not operated with using this adapter
- Compatible with Fujifilm X-mount Camera X-A5 X-A7 X-A10 X-Pro1 X-Pro2 X-Pro3 X-E1 X-E2 X-E3 X-M1 X-T1 X-T2 X-T3 X-T4 X-T10 X-T20 X-T30 X-T30II X-T100 X-H1 & New Models

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007YPSAQA |
| Best Sellers Rank | #79 in Camera Lens Adapters & Converters |
| Brand | Fotasy |
| Built-In Media | M42 Lens to Fuji X Adapter |
| Camera Lens | 42 millimetres |
| Camera Lens Description | 42 millimetres |
| Color | Black |
| Compatible Camera Models | [Fujifilm X-mount camera models] |
| Compatible Camera Mount | Fujifilm X |
| Compatible Devices | Fujfifilm X-Pro1 X-Pro2 X-E1 X-E2 X-E3 X-A5 X-M1 X-T1 X-T2 X-T3 X-T10 X-T20 X-T30 X-H1 |
| Compatible Mountings | Fujifilm X |
| Customer Reviews | 4.4 out of 5 stars 177 Reviews |
| Exposure Control Type | Manual |
| Focal Length Description | 42 millimeters |
| Focus Type | Manual Focus |
| Global Trade Identification Number | 03249476729207 |
| Image stabilization | Digital |
| Item Type Name | M42 lens to fuji x adapter. |
| Item Weight | 1.6 ounces |
| Lens | Standard |
| Lens Design | Fixed |
| Lens Mount | Fujifilm X |
| Lens Type | Standard |
| Manufacturer | Photography Accessories INC |
| Manufacturer Part Number | AF42 |
| Maximum Aperture | 1 millimeters |
| Maximum Focal Length | 1 millimeters |
| Minimum Aperture | 1 millimeters |
| Minimum Focal Length | 1 millimeters |
| Model Name | FX42 |
| Model Number | FX42 |
| Number of Items | 1 |
| Warranty Description | no |

## Product Details

- **Brand:** Fotasy
- **Camera Lens Description:** 42 millimetres
- **Compatible Mountings:** Fujifilm X
- **Focal Length Description:** 42 millimeters
- **Lens Type:** Standard

## Images

![Adjustable M42 Lens to Fuji X Adapter, 42mm Screw Mount Lens to X Mount Adapter Compatible with Fujifilm X-Mount X-Pro1 X-Pro2 X-E1 X-E2 X-E3 X-A5 X-M1 X-T1 X-T2 X-T3 X-T10 X-T20 X-T30 X-H1 - Image 1](https://m.media-amazon.com/images/I/61-dyKicjyL.jpg)

## Questions & Answers

**Q: Can you place a x-fujinon 1:1.9 f=50mm fm lens to this mount?**
A: No.  This is for mounting lenses originally made for Pentax/Praktica slr film cameras with a 42 millemeter thread mount to modern Fuji "X" series bodies.

**Q: Does the adapter change the functional focal length of the lens?**
A: The earlier answers confuse focal length with angle of view. These are two different things. Focal length is not changed at all by either the adapter or the camera; you would need additional optics to do that. What does change is the effective angle of view, because the APS-C sensor in the camera is smaller than a 35mm film frame. So, yes, in terms of angle of view, a 50mm lens ends up giving you a narrower angle of view comparable to a 75mm lens due to the smaller sensor, but that's not a change of focal length.

**Q: Will this adapter work with fuji xt1 and can you mount a holga pinhole lens cap which fits a canon ef adapter on it?**
A: The adaptor should work on any of the x mount series (they all use the same fitting) but I do not know directly about putting a holga pinhole cap on the other end. If the cap fits the Canon gear, it probably will work, but you will have to try it to be sure.

**Q: does it work with fujifilm xt 20?**
A: You will have to go into the camera's menu and look for a shoot without lens option.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works nicely for astrophotography
*by B***L on July 3, 2026*

I have several of these adapters to allow my to use old M42 fixed focal length lenses with my Fuji body for astrophotography. When used with astrophotography, it is important that the lens be able to reach infinity focus, and these adapters meet that requirement. The adapter is made of metal, and includes a small hex key. The hex key allows you to loosen the set screw holding the M42 lens so you can rotate the lens body to whatever position you want.

### ⭐⭐⭐⭐⭐ Well made product!
*by T***E on January 7, 2017*

Recently ordered the Fotasy M42 to Fuji X adapter. Because of the low price, I was initially worried about the build quality, or the fit, but that proved to be completely unnecessary. The quality and fit and is surprisingly good! Excellent even. It is well made and light weight, with steel mounts, so the risk of anything breaking is slim to none. There are no sharp edges and the whole things must have been CNC milled. I see absolutely no reason to ever buy a more expensive band.

### ⭐⭐⭐⭐ Excellent Adapter with a Major Flaw.
*by B***A on May 13, 2018*

Of the three Fotasy adapters I bought this is the only one with an issue. The adapter built is just fine. It mounts to the lens and the body very easily and it is pretty snug. The only flaw is when I screw on my M42 lenses. The lens ends up being a half turn to far such that the aperture markers face the bottom of the body instead of the top where you can see them. It works but it is upside down. I don't know if this is the issue with all of their M42 adapters or I just got a bad one. Too bad because the fit and finish is as good as more expensive adapters. I am going to returns it for a replacement. Hopefully the replacement would be pointing in the right direction.

## Frequently Bought Together

- Fotasy Adjustable M42 Lens to Fuji X Adapter, 42mm Screw Mount Lens to X Mount Adapter Compatible with Fujifilm X-Mount X-Pro1 X-Pro2 X-E1 X-E2 X-E3 X-A5 X-M1 X-T1 X-T2 X-T3 X-T10 X-T20 X-T30 X-H1
- Fotasy PK lens to Fuji X Adapter, Adapter for Pentax K Mount, Compatible with Fujifilm X-Pro1 X-Pro2 X-Pro3 X-E2 X-E3 X-A10 X-T1 X-T2 X-T3 X-T4 X-T10 X-T20 X-T30 X-T30II X-T100 X-H1
- Fotasy Copper Nikkor Lens to Fuji X Adapter, NK F Mount to X Adapter, Compatible with Fujifilm X-Pro1 X-Pro2 X-Pro3 X-E2 X-E3 X-A10 X-T1 X-T2 X-T3 X-T4 X-T10 X-T20 X-T30 X-T30II X-T100 X-H1

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-12*