---
product_id: 528739244
title: "Hersmay M42-EOSR M42 to EOS RF Lens Mount Adapter M42 Lens for Canon EOS R RP R5 R5C R6 R6II R7 R8 R10 R50 R100 Full Frame Mirrorless Camera"
brand: "hersmay"
price: "฿1535"
currency: THB
in_stock: true
reviews_count: 3
url: https://www.desertcart.co.th/products/528739244-hersmay-m42-eosr-m42-to-eos-rf-lens-mount-adapter
store_origin: TH
region: Thailand
---

# Precision fit with zero lens wobble Supports infinity focus & CRC lenses Full metal mount for ultimate durability Hersmay M42-EOSR M42 to EOS RF Lens Mount Adapter M42 Lens for Canon EOS R RP R5 R5C R6 R6II R7 R8 R10 R50 R100 Full Frame Mirrorless Camera

**Brand:** hersmay
**Price:** ฿1535
**Availability:** ✅ In Stock

## Summary

> 🔗 Unlock timeless glass on modern Canon bodies—manual control, infinite possibilities!

## Quick Answers

- **What is this?** Hersmay M42-EOSR M42 to EOS RF Lens Mount Adapter M42 Lens for Canon EOS R RP R5 R5C R6 R6II R7 R8 R10 R50 R100 Full Frame Mirrorless Camera by hersmay
- **How much does it cost?** ฿1535 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/528739244-hersmay-m42-eosr-m42-to-eos-rf-lens-mount-adapter)

## Best For

- hersmay enthusiasts

## Why This Product

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

## Key Features

- • **Manual Mastery:** Supports AV and M modes, empowering you with full manual control over aperture and focus for creative precision.
- • **Rock-Solid Metal Build:** Crafted from premium aluminum and brass for unmatched durability and a sleek, professional feel.
- • **Seamless Compatibility:** Effortlessly mounts M42 screw lenses onto Canon EOS R full-frame mirrorless bodies without any play or wiggle.
- • **Plug-and-Play Simplicity:** No adjustments needed—just attach and shoot, unlocking vintage lens magic on cutting-edge Canon RF cameras.
- • **Infinity Focus Guaranteed:** Engineered to maintain perfect registration distance, ensuring sharp infinity focus even with complex CRC or floating element lenses.

## Overview

The Hersmay M42-EOSR adapter is a robust, all-metal lens mount adapter that allows photographers to use classic M42 screw-mount lenses on Canon EOS R series full-frame mirrorless cameras. It ensures a precise, wobble-free fit and supports manual aperture and focus control, maintaining correct infinity focus for lenses with floating elements or CRC designs. This adapter bridges vintage optics with modern imaging technology, perfect for creative professionals seeking unique manual lens experiences.

## Description

Compatible with: For all mirrorless RF mount cameras such as EOS R, EOS RP, EOS R5 and EOS R6 (Not suitable for EOS EF Film/SLR cameras and EOS M EF-M cameras) For all M42 lenses with thread mounting (outer diameter 42 mm / inner diameter 41 mm), also known as Praktica thread or Pentax thread. Tips: 1. If you can't press the shutter release when using the EOS mirrorless full screen camera (or reminding that the lens is installed incorrectly), you can set the shutter "No lens release" or "Lock priority (TV)". "and other related settings in the custom settings. 2. This is a manual adapter. You can also use LCD to support focusing. Composition and measurement are easy to control, convenient and fast! 3. You can use the MF zoom focus function (generally soft key B, the button in the bottom right corner), the 7x or 14x zoom focus to achieve the focus function. 4. You can use the M mode or A mode to take photos and enjoy the fun brought through the manual! Package includes: 1 x M42-EOS R lens adapter.

## Features

- Solid full metal mount lens adapter allows M42 42mm Screw Mount Lens to fit on Canon EOSR RF mount series Full Frame Mirrorless Camera body.
- Supports AV / M mode. There is no electronic element in the adapter, aperture and focusing must be manually control.
- Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter.
- Material: Aluminium and brass. Precise fit and solid connection - lens has no play, gap or wiggling when mounted on adapter and no adjustments are required to fit your lens.
- Designed to reach infinity focus while maintaining the correct registration distance required to support CRC lenses or lenses with floating elements.

## Images

![Hersmay M42-EOSR M42 to EOS RF Lens Mount Adapter M42 Lens for Canon EOS R RP R5 R5C R6 R6II R7 R8 R10 R50 R100 Full Frame Mirrorless Camera - Image 1](https://m.media-amazon.com/images/I/61iPcZnDU7L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect fit
*by M***N on February 6, 2025*

Nice no nonsense adapter for M42 screw mount lenses to Canon. Great fit, nicely built.

### ⭐ Doesn't Fit
*by B***Y on August 23, 2023*

This adapter is awful. It doesn't fit my vintage M42 lens because it only screws on a little less than halfway. Currently my lens is using a M42 to EOS adapter that fits just fine.

### ⭐⭐⭐⭐ woks great
*by R***R on January 10, 2023*

This item works great. I have however with some of my extension tubes issues. I am not certain if the extension tubes have the issue or this adapter. In any case I bought lots of extension tubes 30mm, 20mm, 10mm, 15mm, 12mm, 7mm, 3mm, ... and so on that work between themselves ok, However the 20mm and 30mm do not fit on the base, luckily the 10mm did perfectly fit so I could through a combination in different order create my 50mm I needed. This allows me to put then the extension on it so I can mount my microscope lens to the RF mount via the m42 rings. So overall I am very happy. Previously I had: RF-EOS <> EOS to M42 <> then all the different rings to get the right length, so I replaced with this the EOS adapter and the EOS to m42 adapter. I will now keep this together and have now a "dedicated" solution. Originally I 3-d print the adapter from RF to RMS, but as it turned out this did not work at all as my 3-d printer did not result in a mountable adapter to RF. Instead of reprinting one to EOS, I decided to just go with this ring and the extension tubes. I am very satisfied although I gave it not 5 stars.

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**Shop now:** [https://www.desertcart.co.th/products/528739244-hersmay-m42-eosr-m42-to-eos-rf-lens-mount-adapter](https://www.desertcart.co.th/products/528739244-hersmay-m42-eosr-m42-to-eos-rf-lens-mount-adapter)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-30*