I've used this extender on my R5 with both my 100-500mm and 800mm lenses and it works extremely well. It does add one F-stop but that has been a small price to pay for the extra reach as I photograph wildlife and getting close can be tricky. I have noticed that the auto focusing (particularly eye detection) can be fractionally slower when I use the extender than just using the native lens, but it hasn't been significant enough for me to abandon the idea of using it for the extra reach. Thankfully, the R5 can handle high ISO rates well enough that the loss of the F-stop hasn't stopped me from getting decent photos. In fact, the photos are limited only by my own lack of expertise.
It is a very useful addition for squeezing a little extra reach out of my lenses for capturing wildlife in the field. I included two photos I took using the R5 + extender with my 100-500mm telephoto, giving me 700mm for these shots. While I'm not a great photographer, they do give you a feel for what is possible.
One note: to install the extender, your compatible lens needs to be fully extended. For example, when I used the 1.4X extender with my 100-500mm Canon RF lens, the lens was fully extended to 500mm before I installed the extender. Until the lens is fully extended, you cannot install the extender. Now, I can inch the lens down to about 450mm but with the extender installed, you're basically "committed" to using the lens at the full reach, which in my case was the full 500mm, giving me 700mm with the two components. If that makes sense.
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This Item  Canon EXT. RF1.4X(N) (4113C002) |  |  |  |  |  | |
| Price | $499.00 | $1,599.00 | -18% $2,224.00 New Price: $2,699.00 | -13% $2,099.00 List: $2,399.00 | $1,299.00 | $2,374.95 |
| Delivery | Get it as soon as Friday, May 17 | Get it as soon as Friday, May 17 | — | Get it as soon as Friday, May 17 | Get it as soon as Friday, May 17 | Get it as soon as Monday, May 13 |
| Customer Ratings | ||||||
| Auto focus | ||||||
| Picture quality | ||||||
| Image stabilization | ||||||
| Value for money | ||||||
| Sold By | Amazon.com | Amazon.com | Al's Variety | Amazon.com | Amazon.com | 6ave |
| lens type | Standard | Telephoto | Telephoto | Telephoto | zoom | Telephoto |
| compatible mountings | Canon RF | Canon RF | Canon RF | Canon RF | Canon RF | Canon RF |
| lens design | Prime | Zoom | Zoom | Zoom | Zoom | Zoom |
| focus type | — | Auto Focus | Auto Focus | automatic | Auto Focus | Manual Focus, Auto Focus |
| minimum focal length | 0 millimeters | 70 millimeters | — | 2.8 millimeters | — | 100 millimeters |
| max focal length | 1.4 millimeters | 200 millimeters | — | 2.8 millimeters | — | 500 millimeters |
| fixed focal length | 1.4 millimeters | 200 millimeters | 500 millimeters | 70 millimeters | 105 millimeters | 500 millimeters |
From the manufacturer
Canon Extender RF1.4x
Get even closer to distant subjects with Canon’s Extender RF1.4x. Featuring a smart-connect design, this extender seamlessly attaches to select RF series lenses* and increases the focal length by a factor of 1.4x, helping expand your reach without compromising on overall quality or performance. Built with the latest high-refraction, low-dispersion glass to minimize chromatic aberration, and optimized coatings that reduce ghosting, this powerful extender is an ideal choice for sports and wildlife photographers. Plus, with a dust- and water-resistant construction ― including a heat shield exterior coating to prevent overheating ― the Extender RF1.4x makes a durable and versatile addition to your gear bag.
* Compatible with the RF600mm F11 IS STM, RF800mm F11 IS STM and RF100-500mm F4.5-7.1 L IS USM lenses.
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Decent extender for RF Lenses
I've used this extender on my R5 with both my 100-500mm and 800mm lenses and it works extremely well. It does add one F-stop but that has been a small price to pay for the extra reach as I photograph wildlife and getting close can be tricky. I have noticed that the auto focusing (particularly eye detection) can be fractionally slower when I use the extender than just using the native lens, but it hasn't been significant enough for me to abandon the idea of using it for the extra reach. Thankfully, the R5 can handle high ISO rates well enough that the loss of the F-stop hasn't stopped me from getting decent photos. In fact, the photos are limited only by my own lack of expertise.It is a very useful addition for squeezing a little extra reach out of my lenses for capturing wildlife in the field. I included two photos I took using the R5 + extender with my 100-500mm telephoto, giving me 700mm for these shots. While I'm not a great photographer, they do give you a feel for what is possible.One note: to install the extender, your compatible lens needs to be fully extended. For example, when I used the 1.4X extender with my 100-500mm Canon RF lens, the lens was fully extended to 500mm before I installed the extender. Until the lens is fully extended, you cannot install the extender. Now, I can inch the lens down to about 450mm but with the extender installed, you're basically "committed" to using the lens at the full reach, which in my case was the full 500mm, giving me 700mm with the two components. If that makes sense.
Top reviews from the United States
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Reviewed in the United States on February 6, 2021
I've used this extender on my R5 with both my 100-500mm and 800mm lenses and it works extremely well. It does add one F-stop but that has been a small price to pay for the extra reach as I photograph wildlife and getting close can be tricky. I have noticed that the auto focusing (particularly eye detection) can be fractionally slower when I use the extender than just using the native lens, but it hasn't been significant enough for me to abandon the idea of using it for the extra reach. Thankfully, the R5 can handle high ISO rates well enough that the loss of the F-stop hasn't stopped me from getting decent photos. In fact, the photos are limited only by my own lack of expertise.
It is a very useful addition for squeezing a little extra reach out of my lenses for capturing wildlife in the field. I included two photos I took using the R5 + extender with my 100-500mm telephoto, giving me 700mm for these shots. While I'm not a great photographer, they do give you a feel for what is possible.
One note: to install the extender, your compatible lens needs to be fully extended. For example, when I used the 1.4X extender with my 100-500mm Canon RF lens, the lens was fully extended to 500mm before I installed the extender. Until the lens is fully extended, you cannot install the extender. Now, I can inch the lens down to about 450mm but with the extender installed, you're basically "committed" to using the lens at the full reach, which in my case was the full 500mm, giving me 700mm with the two components. If that makes sense.
It is a very useful addition for squeezing a little extra reach out of my lenses for capturing wildlife in the field. I included two photos I took using the R5 + extender with my 100-500mm telephoto, giving me 700mm for these shots. While I'm not a great photographer, they do give you a feel for what is possible.
One note: to install the extender, your compatible lens needs to be fully extended. For example, when I used the 1.4X extender with my 100-500mm Canon RF lens, the lens was fully extended to 500mm before I installed the extender. Until the lens is fully extended, you cannot install the extender. Now, I can inch the lens down to about 450mm but with the extender installed, you're basically "committed" to using the lens at the full reach, which in my case was the full 500mm, giving me 700mm with the two components. If that makes sense.
Images in this review
Reviewed in the United States on January 5, 2024
Reviewed in the United States on October 2, 2022
I bought this zoom extender for a recent trip I took to the San Diego Zoo and it paid off in spades!
I was able to capture some fantastic images with very little—if any!—quality or functionality loss.
I paired this with my Canon EOS R and my RF 100-500mm f/4.5-7.1 lens and it worked like a charm.
My only qualm is that instead of starting out at 140mm (100mm × 1.4x) is you have to start at 350mm (250mm × 1.4x) as your shortest zoom range. Also, this is best for daytime shooting as your minimum f-stop is now f/8-f/11 (depending on your zoom length). But otherwise it's fantastic and worth every penny.
I was able to capture some fantastic images with very little—if any!—quality or functionality loss.
I paired this with my Canon EOS R and my RF 100-500mm f/4.5-7.1 lens and it worked like a charm.
My only qualm is that instead of starting out at 140mm (100mm × 1.4x) is you have to start at 350mm (250mm × 1.4x) as your shortest zoom range. Also, this is best for daytime shooting as your minimum f-stop is now f/8-f/11 (depending on your zoom length). But otherwise it's fantastic and worth every penny.
Images in this review
Reviewed in the United States on July 27, 2021
Reviewed in the United States on May 31, 2022
I use the extender on my RF 100-500 lens. It gives me 700mm at full extension. There is little or no degradation in picture quality. The down side is that the lens is limited to 300mm and above. There is a physical block to restrict using the lens below the 300mm mark. This is of course due to the physical characteristics of the lens and adapter with a full frame sensor. I keep the extender on my RF100-500 about 60% of the time. The Bluebird pic was taken on an EOR R6 1/12000, F10, 700mm, ISO 800. Distance of about 60 feet. This is straight out of camera with no post.
Images in this review
