Canon
Canon Extender RF 2X Teleconverter Renewed Lens
★★★★★
f/5.6f/4.5f/2.f/11
Double your focal reach on compatible RF telephotos while keeping autofocus, metering, and image stabilization fully active — no intelligence lost at the mount.
$749.95*$804.95Save 6%
View on Amazon
✓ In Stock on Amazon.com
*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.
Notice a mistake? Let Us Know
Overview
Key Features
Bundle Items Includes: 1 x Canon Extender RF 2x, 1 x Lens Cap Keeper, 1 x Cleaning Kit
Extend the reach of select Canon RF-mount lenses with the Extender RF 2x. This teleconverter magnifies the image by 2x and retains full communication between the lens and camera body, enabling metering, autofocus, and image stabilization as well as the transmission of Exif data. Additionally, the Extender RF is dust and water resistant and has a heat shield exterior to ensure optimal performance in a range of conditions.
Key Features: RF-Mount Teleconverter - 2x Magnification Factor - Maintains Metering, Autofocus, and IS - Dust and Water Resistant
Compatibility: RF 100-400mm f/5.6-8 IS USM, RF 100-500mm f/4.5-7.1L IS USM (can only be used within 300-500mm range), RF 400mm f/2.8L IS USM, RF 600mm f/11 IS STM, RF 800mm f/11 IS STM, RF 600mm f/4L IS USM
Specifications
Brand
Canon
Model Name
Extender RF 2x Teleconverter
Condition
Renewed
Mount Type
RF-Mount
Magnification Factor
2x
Maintained Functions
Metering, Autofocus, Image Stabilization
Resistance
Dust and Water Resistant
Exterior Feature
Heat Shield
Compatibility (Select Lenses)
RF 100-400mm f/5.6-8 IS USM, RF 100-500mm f/4.5-7.1L IS USM (within 300-500mm), RF 400mm f/2.8L IS USM, RF 600mm f/11 IS STM, RF 800mm f/11 IS STM, RF 600mm f/4L IS USM
Pros & Cons
👍 Pros
- 2x magnification doubles effective focal length on compatible RF telephotos — the RF 600mm f/4L becomes 1200mm f/8, delivering frame-filling reach for wildlife and aviation subjects from distances that keep the shooter unobtrusive
- Full electronic communication retention means Canon's AI subject-detection autofocus, in-lens optical stabilization, and metering all function as designed through the extender — no intelligence is sacrificed to gain reach
- Dust and water-resistant construction matches the field sealing of L-series RF telephotos, maintaining full system weather integrity when paired with a similarly sealed lens in rain or dusty outdoor conditions
- Heat shield exterior stabilizes optical performance in high-temperature environments like summer outdoor sports venues or desert wildlife locations where heat haze already limits image quality
- The bundle includes a lens cap keeper and cleaning kit, providing immediate practical field-maintenance value without a separate accessory purchase
👎 Cons
- 2x magnification costs exactly two stops of maximum aperture — the RF 100-500mm f/4.5-7.1L becomes f/9-14.2 with the extender, which pushes exposure requirements and AF performance hard in anything less than bright outdoor light
- Compatibility is limited to six specific RF-mount lenses; it does not work with EF lenses, the majority of the RF lineup, or RF-S mount optics — the purchase only makes sense if you own or plan to own a compatible telephoto
- The RF 100-500mm f/4.5-7.1L pairing is restricted to the 300-500mm range, eliminating the extender's usefulness at the zoom's shorter focal lengths and reducing versatility in that specific combination
- Autofocus speed and tracking reliability degrade when the combined effective aperture falls into f/9-f/14 territory — phase-detect systems work harder at narrow apertures, and missed focus on fast subjects increases
- As a renewed unit, the optical element condition depends on refurbishment quality — no new-unit warranty applies, and the original purchase date for Canon's limited warranty does not reset at renewal
Frequently Asked Questions
Which Canon RF lenses are compatible with the Extender RF 2x?
Six lenses are officially supported: RF 100-400mm f/5.6-8 IS USM, RF 100-500mm f/4.5-7.1L IS USM (300-500mm range only), RF 400mm f/2.8L IS USM, RF 600mm f/11 IS STM, RF 800mm f/11 IS STM, and RF 600mm f/4L IS USM. No other RF lenses are mechanically or electronically compatible.
Does the Extender RF 2x work with EF lenses via the EF-RF mount adapter?
No. The extender is RF-mount specific and communicates through the RF electronic protocol. It cannot be inserted into an EF-to-RF adapter stack — it must sit directly between a compatible RF lens and an RF-mount camera body.
Does autofocus remain functional with the 2x extender attached?
Yes — full autofocus, metering, image stabilization, and Exif data pass through uninterrupted. However, the 2x magnification reduces effective maximum aperture by two full stops, and AF acquisition speed is meaningfully slower as a result, particularly in low light or on lenses already operating at modest apertures.
How does the RF 100-500mm f/4.5-7.1L compatibility limitation work?
The RF 100-500mm can only use this extender in the 300-500mm focal range. Below 300mm, the rear element geometry of the lens conflicts with the extender's front element — the combination is mechanically incompatible at shorter focal lengths within that zoom range.
This is a renewed unit — what should I check upon receipt?
Inspect all optical elements for dust, fungus, or element separation under a bright light before field use. Renewed Canon products have been inspected and tested for proper function, but a quick optical inspection before the first shoot is good practice with any pre-owned glass element.
Related Products
