---
product_id: 701936838
title: "Telephoto Lens RF Lens for Canon, 420-800mm Manual Focus MF Zoom Lens for Canon EOS R, Ra, RP, R3, R5, R5 C, R6, R6 Mark II, R7, R8, R10, R50, R100 Mirrorless"
brand: "benoison"
price: "$191.46"
currency: USD
in_stock: true
category: "Benoison"
url: https://www.desertcart.us/products/701936838-telephoto-lens-rf-lens-for-canon-420-800mm-manual-focus
store_origin: US
region: United States of America
---

# 420-800mm super telephoto zoom Durable RF mount, no adapter needed Full manual focus precision Telephoto Lens RF Lens for Canon, 420-800mm Manual Focus MF Zoom Lens for Canon EOS R, Ra, RP, R3, R5, R5 C, R6, R6 Mark II, R7, R8, R10, R50, R100 Mirrorless

**Brand:** benoison
**Price:** $191.46
**Availability:** ✅ In Stock

## Summary

> 🔭 Zoom into the extraordinary — capture what others only dream of!

## Quick Answers

- **What is this?** Telephoto Lens RF Lens for Canon, 420-800mm Manual Focus MF Zoom Lens for Canon EOS R, Ra, RP, R3, R5, R5 C, R6, R6 Mark II, R7, R8, R10, R50, R100 Mirrorless by benoison
- **How much does it cost?** $191.46 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/701936838-telephoto-lens-rf-lens-for-canon-420-800mm-manual-focus)

## Best For

- benoison enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Robust construction with premium materials ensures your lens withstands adventurous shoots season after season.
- • **Creative Control:** Fixed aperture from f/8.3 to f/16 offers consistent depth of field for stunning telephoto compositions.
- • **Reach Beyond Limits:** Massive 420-800mm focal range captures distant wildlife and moon shots with unmatched detail.
- • **Seamless Compatibility:** Upgraded RF mount fits Canon EOS R series mirrorless cameras directly—ditch the adapter hassle.
- • **Precision in Your Hands:** Full manual focus ring lets you fine-tune every shot for razor-sharp clarity—no autofocus distractions.

## Overview

The BENOISON 420-800mm RF telephoto lens is a manual focus zoom lens designed exclusively for Canon EOS R series mirrorless cameras. Featuring a super-telephoto focal length range, durable RF mount construction, and a fixed aperture from f/8.3 to f/16, it offers photographers precise control and exceptional reach for wildlife, moon, and distant subject photography. This lens requires manual focusing and camera settings adjustment but delivers professional-grade telephoto performance without the need for adapters.

## Description

desertcart.com : BENOISON Telephoto Lens RF Lens for Canon, 420-800mm Manual Focus MF Zoom Lens for Canon EOS R, Ra, RP, R3, R5, R5 C, R6, R6 Mark II, R7, R8, R10, R50, R100 Mirrorless : Electronics

## Features

- 【Super Telephoto Lens】Manual focus telephoto lens, NOT original-lens, a focal length of 420-800mm and an aperture of F/8.3-16 (non-adjustable aperture value, f8.3 at 420mm and f16 at 800mm), filter size of 62mm, full frame, RF mount, built with high-quality materials and robust construction, making them durable and long-lasting;
- 【RF Lens for Canon R Series Mirrorless Camera】420-800mm Manual Telephoto Lens Compatible for Canon EOS R, Ra, RP, R3, R5, R5 C, R6, R6 Mark II, R7, R8, R10, R50, R100 Mirrorless Camera (Not for Canon M series Mirrorless);
- 【Upgraded Version】Upgraded into an RF mount, which can be mounted on Canon mirrorless cameras without connecting the T adapter ring. For those who photograph wildlife or the moon as a hobby, this lens would be a great choice;
- 【User Instraction】This is a FULL MANUAL lens, NO Electronic Contacts, your camera will not allow to press the shutter after the lens is mounted, please set the "Release shutter w/o Lens" option in the camera menu to "Enable". Tips to use our Manual Lens: 1) Set the Release shutter w/o Lens option in the camera menu to Enable. 2) Set the mode dial to Manual (M);
- 【Manual Focus】The lens has a focus ring located near the front. Manually rotate this focus ring to adjust the focus. Turn the ring slowly until the subject you want to focus on appears sharp and clear. Also, with manual lenses, the aperture value is not displayed in the viewfinder (F00 is displayed).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DQNRY2DR |
| Best Sellers Rank | #39 in SLR Camera Lenses |
| Brand | BENOISON |
| Built-In Media | Lens Cleaning Cloth, Telephoto Lens RF mount, User Manual |
| Camera Lens | Manual focus 420-800mm telephoto lens (RF mount) |
| Color | Black |
| Compatible Camera Mount | Canon RF |
| Compatible Devices | for Canon RF mount mirrorless cameras |
| Customer Reviews | 3.7 3.7 out of 5 stars (68) |
| Exposure Control Type | Manual |
| Focal Length Description | 420-800mm |
| Focus Type | Manual Focus |
| Image stabilization | No image stabilization |
| Lens | Telephoto |
| Lens Design | Zoom |
| Lens Fixed Focal Length | 420 Millimeters |
| Lens Mount | Canon RF |
| Manufacturer | BENOISON |
| Manufacturer Part Number | 420-B-RF |
| Maximum Aperture | 8.3 f |
| Maximum Focal Length | 800 Millimeters |
| Media Type | ProductImage |
| Minimum Aperture | 16 f |
| Minimum Focal Length | 420 Millimeters |
| Model Name | 420-B |
| Photo Filter Size | 62 Millimeters |
| Real Angle Of View | 5 Degrees |
| Warranty Description | 1 year |
| Water Resistance Level | Not Water Resistant |
| Zoom Ratio | 1.9 |

## Product Details

- **Brand:** BENOISON
- **Camera Lens Description:** Manual focus 420-800mm telephoto lens (RF mount)
- **Compatible Mountings:** Canon RF
- **Focal Length Description:** 420-800mm
- **Lens Type:** Telephoto

## Images

![Telephoto Lens RF Lens for Canon, 420-800mm Manual Focus MF Zoom Lens for Canon EOS R, Ra, RP, R3, R5, R5 C, R6, R6 Mark II, R7, R8, R10, R50, R100 Mirrorless - Image 1](https://m.media-amazon.com/images/I/61v5KfuXrzL.jpg)

## Available Options

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

## Questions & Answers

**Q: Why can't I press the shutter after mounting the lens?**
A: Please do Enable the "Release shutter w/o lens", and then you can press the shutter to take a picture.

**Q: Why does my picture out of focus and very blurry?**
A: Since our lenses are manual lenses, there are no electronic contacts for autofocus. Need to turn the focus ring (on the front of the lens) for manual focusing. If it is still blurry, use a tripod and time-lapse function to keep the image stable.

**Q: Why is F00 displayed and how can the aperture value be set?**
A: As the manual lens has no electronic contacts to recognize the aperture value, “F00” is displayed. The aperture value can only be adjusted automatically by changing the focal length. (420mm/F8.3 →500mm/F10→600mm/F12→700mm/F14→800mm/F16)

**Q: What if the image turn out bright?**
A: If the image is too bright, lower the ISO (e.g. from 200 to 100) to reduce the light sensitivity and increase the shutter speed (e.g. from 1/125s to 1/250s) to reduce the exposure and avoid overexposure.

**Q: What if the image turn out dark?**
A: If the image is too dark, increase the ISO (e.g. from 800 to 1600) to increase the sensitivity and decrease the shutter speed (e.g. from 1/250s to 1/125s) to allow more light onto the sensor.

## Frequently Bought Together

- BENOISON Telephoto Lens for Canon - RF Lens 420-800mm Manual Focus MF Zoom Lens for Canon EOS R, Ra, RP, R3, R5, R5 C, R6, R6 Mark II, R7, R8, R10, R50, R100 Mirrorless
- Altura Photo 58MM Tulip Flower Lens Hood for Canon EOS 77D 80D 90D Rebel T8i T7 T7i T6i T6s T6 SL2 SL3 DSLR Cameras with Canon EF-S 18-55mm f/3.5-5.6 is Lens and Select Nikon Lenses
- Ultra Deluxe Lens Kit for Canon Rebel T3, T5, T5i, T6, T6i, T7, T7i, EOS 80D, EOS 77D Cameras with Canon EF-S 18-55mm is II Lens - Includes: 7pc 58mm Filter Set + 58mm Wide Angle and Telephoto Lens

---

## 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/701936838-telephoto-lens-rf-lens-for-canon-420-800mm-manual-focus](https://www.desertcart.us/products/701936838-telephoto-lens-rf-lens-for-canon-420-800mm-manual-focus)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-12*