--- product_id: 225880594 title: "Fotga M42-EOSR Lens Mount Adapter Ring for M42 Screw Lens to Canon EOS R RP R5 R6 RF Mount Mirrorless Camera" brand: "focusfoto" price: "$35.87" currency: USD in_stock: true reviews_count: 10 category: "Focus Foto" url: https://www.desertcart.us/products/225880594-fotga-m42-eosr-lens-mount-adapter-ring-for-m42-screw store_origin: US region: United States of America --- # Precision fit with zero lens wobble Manual aperture & focus control for creative mastery Full metal mount for rock-solid durability Fotga M42-EOSR Lens Mount Adapter Ring for M42 Screw Lens to Canon EOS R RP R5 R6 RF Mount Mirrorless Camera **Brand:** focusfoto **Price:** $35.87 **Availability:** ✅ In Stock ## Summary > 🔗 Unlock vintage lens magic on your cutting-edge Canon mirrorless! ## Quick Answers - **What is this?** Fotga M42-EOSR Lens Mount Adapter Ring for M42 Screw Lens to Canon EOS R RP R5 R6 RF Mount Mirrorless Camera by focusfoto - **How much does it cost?** $35.87 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/225880594-fotga-m42-eosr-lens-mount-adapter-ring-for-m42-screw) ## Best For - focusfoto enthusiasts ## Why This Product - Trusted focusfoto brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rock-Solid Metal Build:** Crafted from premium aluminium and brass for unmatched durability and a secure fit. - • **Seamless Compatibility:** Transforms any M42 screw mount lens into a perfect match for Canon EOS R RF mount mirrorless cameras. - • **Creative Manual Control:** Supports AV and M modes, empowering you to master aperture and focus manually for artistic shots. - • **Effortless Installation:** Snug, no-wiggle fit ensures your lens stays locked in place without any adjustments or play. - • **Precision Infinity Focus:** Engineered to maintain exact registration distance, supporting CRC and floating element lenses flawlessly. ## Overview The Fotga M42-EOSR Lens Mount Adapter Ring is a robust, full-metal adapter that lets you mount classic M42 screw lenses onto Canon EOS R series mirrorless cameras. Designed for precision and durability, it ensures a snug fit with no lens wobble and supports manual aperture and focus control, enabling creative freedom while maintaining perfect infinity focus for lenses with floating elements. ## Description 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. Compatible with: For all Canon RF mount mirrorless cameras, such as EOS R, EOS RP, EOS R5, EOS R6 (Not suitable for Canon EOS EF mount film / digital SLR cameras and EOS M EF-M mount cameras) For all M42 thread mount lenses(External diameter 42mm/Inner diameter 41mm), also called Praktica thread or Pentax threadTips: 1. When using the Canon EOSR full-frame mirrorless camera, if you can't press the shutter (or was reminded that the lens is installed incorrectly), you can adjust the "release shutter without lens" or " shutter priority (TV)" and other related settings in the custom settings . 2. This is a manual adapter, you can also use LCD to assist to focus, composition and metering are easy to control, convenient and fast! 3. You can use the MF zoom focus function (Generally soft key B, the button in the lower right corner), 7X or 14X zoom focus to achieve the focus function. 4. You can use M mode or A mode to shoot and enjoy the fun brought by manual! Package Include: 1 X Lens Adapter Review: Works fine - It does its job , Review: nice fit - lens feels sturdy on it and fits nice and snug on the camera ## 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 | B08G4VD38C | | Best Sellers Rank | 6 in Tripod Mount Rings for Lenses | | Brand | FocusFoto | | Customer Reviews | 4.3 4.3 out of 5 stars (71) | | Date First Available | 20 Aug. 2020 | | Guaranteed software updates until | unknown | | Item Weight | 0.1 Kilograms | | Item model number | M42-EOSR | | Package Dimensions L x W x H | 7.1 x 7 x 3.4 centimetres | | Package Weight | 0.1 Kilograms | | Part number | SFAB251 | ## Images ![Fotga M42-EOSR Lens Mount Adapter Ring for M42 Screw Lens to Canon EOS R RP R5 R6 RF Mount Mirrorless Camera - Image 1](https://m.media-amazon.com/images/I/71RUCbsWVrL.jpg) ![Fotga M42-EOSR Lens Mount Adapter Ring for M42 Screw Lens to Canon EOS R RP R5 R6 RF Mount Mirrorless Camera - Image 2](https://m.media-amazon.com/images/I/71xjTL5BEqL.jpg) ![Fotga M42-EOSR Lens Mount Adapter Ring for M42 Screw Lens to Canon EOS R RP R5 R6 RF Mount Mirrorless Camera - Image 3](https://m.media-amazon.com/images/I/71SSV025BbL.jpg) ![Fotga M42-EOSR Lens Mount Adapter Ring for M42 Screw Lens to Canon EOS R RP R5 R6 RF Mount Mirrorless Camera - Image 4](https://m.media-amazon.com/images/I/71PSBev2NOL.jpg) ![Fotga M42-EOSR Lens Mount Adapter Ring for M42 Screw Lens to Canon EOS R RP R5 R6 RF Mount Mirrorless Camera - Image 5](https://m.media-amazon.com/images/I/71+6Bkgk5ML.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works fine *by G***G on 10 June 2024* It does its job , ### ⭐⭐⭐⭐⭐ nice fit *by A***R on 7 October 2021* lens feels sturdy on it and fits nice and snug on the camera ### ⭐ poor *by M***N on 6 February 2025* The camera side (eos r side) very loose fit. turns to lock position with no resistance, a genuine canon plastic cap just falls off if shaken. cheap and cheap. ## Frequently Bought Together - Fotga M42-EOSR Lens Mount Adapter Ring for M42 Screw Lens to Canon EOS R RP R5 R6 RF Mount Mirrorless Camera - Meike Metal Lens Adapter EF-EOSR Auto-Focus Mount Converter for Canon EF/EF-S Lens to EOS-R EOS-RP R5 R6 R7 R10 C70 and RED Komodo Cameras - Canon RF 50mm F1.8 STM Lens | Compact and Lightweight, Fast F1.8 Aperture, Compatible with all Canon EOS R Series Cameras, Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/225880594-fotga-m42-eosr-lens-mount-adapter-ring-for-m42-screw](https://www.desertcart.us/products/225880594-fotga-m42-eosr-lens-mount-adapter-ring-for-m42-screw) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-10-16*