---
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: "AR$49962"
currency: ARS
in_stock: true
reviews_count: 9
category: "Hersmay"
url: https://www.desertcart.com.ar/products/528739244-hersmay-m42-eosr-m42-to-eos-rf-lens-mount-adapter
store_origin: AR
region: Argentina
---

# Infinity focus with precise registration distance Full metal mount for rock-solid durability Manual aperture & focus control for creative mastery 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:** AR$49962
**Availability:** ✅ In Stock

## Summary

> 🔗 Unlock timeless glass on cutting-edge Canon RF bodies — manual mastery meets modern precision!

## 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?** AR$49962 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/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

- • **Rock-Solid Metal Build:** Crafted from aluminum and brass for zero lens wobble and a perfect fit every time.
- • **Seamless Compatibility:** Effortlessly mounts all M42 screw lenses to Canon EOS RF full-frame mirrorless cameras.
- • **Creative Manual Control:** Supports AV and M modes with full manual aperture and focus for photographers who demand hands-on artistry.
- • **Infinity Focus Precision:** Engineered to maintain exact flange distance, supporting CRC and floating element lenses flawlessly.
- • **Plug-and-Play Simplicity:** No electronic parts means no fuss—just mount, set your camera to manual, and capture stunning shots.

## Overview

The Hersmay M42-EOSR adapter is a precision-engineered, full-metal mount that allows photographers to use classic M42 screw-mount lenses on Canon EOS RF full-frame mirrorless cameras. It ensures a perfect, wobble-free fit and maintains infinity focus by preserving the correct flange distance. Designed for manual aperture and focus control, it supports AV and M shooting modes, empowering creative professionals to blend vintage optics with modern camera technology seamlessly.

## 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.

Review: Thumbs up - It works!
Review: Perfect fit - Nice no nonsense adapter for M42 screw mount lenses to Canon. Great fit, nicely built.

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08CKR8HJ7 |
| Best Sellers Rank | #264 in Camera Lens Adapters & Converters |
| Customer Reviews | 4.3 4.3 out of 5 stars (89) |
| Date First Available | July 8, 2020 |
| Item Weight | 3.52 ounces |
| Manufacturer | Hersmay |
| Package Dimensions | 2.99 x 2.68 x 1.34 inches |

## 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)
![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 2](https://m.media-amazon.com/images/I/71+elj2Nw9L.jpg)
![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 3](https://m.media-amazon.com/images/I/71sRhZfqtoL.jpg)
![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 4](https://m.media-amazon.com/images/I/71Ox4RN2r9L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Thumbs up
*by M***O on July 16, 2025*

It works!

### ⭐⭐⭐⭐⭐ 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.

## Frequently Bought Together

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-02-20*