Canon Extender EF 2x III
The Extender EF 2X III from Canon is designed for select Canon EF mount L-series telephoto lenses. It increases the focal length of a lens by a factor of 2x while still delivering superb image quality. To ensure the best possible image quality in all shooting conditions, it combines redesigned optics, improved data communication between lens and camera and enhanced environmental protection. It is ideal for photojournalists and wildlife, nature and sports photographers who need to get close to distant and challenging subjects and it reduces the need to carry heavy telephoto lenses. The Extender EF 2x III features nine optical elements in five groups, ensuring improved optical performance. All optical elements have Canon's Super Spectra coating to reduce ghosting and flare. A new Fluorine Coating on the front and rear elements makes marks, such as spots left by water or fingerprints, much easier to clean than standard coatings. To facilitate the accurate transfer of imaging data between the lens and camera body, the extender features an integrated processor which ensures all focusing, metering and ID information is available - allowing the photographer to capture balanced, well-exposed images. When combined with the latest range of premium Canon L-series lenses, these extenders enable AF accuracy even when capturing moving subjects. When attached, the 2x extender reduces the effective maximum aperture by 2 stops. A carefully positioned lens release mechanism also makes it easy to mount the extenders quickly, reducing the time that the camera and lens are exposed to the environment. The extenders offer the exceptional build-quality expected from Canon's professional products, and are resistant to both dust and water, allowing photographers to use them in extreme shooting conditions.
The Extender EF 2X III from Canon is designed for select Canon EF mount L-series telephoto lenses. It increases the focal length of a lens by a factor of 2x while still delivering superb image quality. To ensure the best possible image quality in all shooting conditions, it combines redesigned optics, improved data communication between lens and camera and enhanced environmental protection. It is ideal for photojournalists and wildlife, nature and sports photographers who need to get close to distant and challenging subjects and it reduces the need to carry heavy telephoto lenses. The Extender EF 2x III features nine optical elements in five groups, ensuring improved optical performance. All optical elements have Canon's Super Spectra coating to reduce ghosting and flare. A new Fluorine Coating on the front and rear elements makes marks, such as spots left by water or fingerprints, much easier to clean than standard coatings. To facilitate the accurate transfer of imaging data between the lens and camera body, the extender features an integrated processor which ensures all focusing, metering and ID information is available - allowing the photographer to capture balanced, well-exposed images. When combined with the latest range of premium Canon L-series lenses, these extenders enable AF accuracy even when capturing moving subjects. When attached, the 2x extender reduces the effective maximum aperture by 2 stops. A carefully positioned lens release mechanism also makes it easy to mount the extenders quickly, reducing the time that the camera and lens are exposed to the environment. The extenders offer the exceptional build-quality expected from Canon's professional products, and are resistant to both dust and water, allowing photographers to use them in extreme shooting conditions.
The Extender EF 2X III from Canon is designed for select Canon EF mount L-series telephoto lenses. It increases the focal length of a lens by a factor of 2x while still delivering superb image quality. To ensure the best possible image quality in all shooting conditions, it combines redesigned optics, improved data communication between lens and camera and enhanced environmental protection. It is ideal for photojournalists and wildlife, nature and sports photographers who need to get close to distant and challenging subjects and it reduces the need to carry heavy telephoto lenses. The Extender EF 2x III features nine optical elements in five groups, ensuring improved optical performance. All optical elements have Canon's Super Spectra coating to reduce ghosting and flare. A new Fluorine Coating on the front and rear elements makes marks, such as spots left by water or fingerprints, much easier to clean than standard coatings. To facilitate the accurate transfer of imaging data between the lens and camera body, the extender features an integrated processor which ensures all focusing, metering and ID information is available - allowing the photographer to capture balanced, well-exposed images. When combined with the latest range of premium Canon L-series lenses, these extenders enable AF accuracy even when capturing moving subjects. When attached, the 2x extender reduces the effective maximum aperture by 2 stops. A carefully positioned lens release mechanism also makes it easy to mount the extenders quickly, reducing the time that the camera and lens are exposed to the environment. The extenders offer the exceptional build-quality expected from Canon's professional products, and are resistant to both dust and water, allowing photographers to use them in extreme shooting conditions.
The Extender EF 2X III from Canon is designed for select Canon EF mount L-series telephoto lenses. It increases the focal length of a lens by a factor of 2x while still delivering superb image quality. To ensure the best possible image quality in all shooting conditions, it combines redesigned optics, improved data communication between lens and camera and enhanced environmental protection. It is ideal for photojournalists and wildlife, nature and sports photographers who need to get close to distant and challenging subjects and it reduces the need to carry heavy telephoto lenses. The Extender EF 2x III features nine optical elements in five groups, ensuring improved optical performance. All optical elements have Canon's Super Spectra coating to reduce ghosting and flare. A new Fluorine Coating on the front and rear elements makes marks, such as spots left by water or fingerprints, much easier to clean than standard coatings. To facilitate the accurate transfer of imaging data between the lens and camera body, the extender features an integrated processor which ensures all focusing, metering and ID information is available - allowing the photographer to capture balanced, well-exposed images. When combined with the latest range of premium Canon L-series lenses, these extenders enable AF accuracy even when capturing moving subjects. When attached, the 2x extender reduces the effective maximum aperture by 2 stops. A carefully positioned lens release mechanism also makes it easy to mount the extenders quickly, reducing the time that the camera and lens are exposed to the environment. The extenders offer the exceptional build-quality expected from Canon's professional products, and are resistant to both dust and water, allowing photographers to use them in extreme shooting conditions.
in 41 offers
The lowest price for Canon Extender EF 2x III right now is $234.69 at eBay.com.au, compared across 29 retailers.
The all-time low was $165.00 on 5 Mar 2026 — today's price is 42% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 8 Sept 2026.
Last updated at 08/09/2026 05:50:34
Canon 4410B002 Extender 2-2mm 35mm Lens for Canon EF Cameras
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Canon Extender EF 2X III Lens
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Canon Extender Ef 2x Iii Teleconverter Lens For Ef Eos From Japan Mint
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Canon Extender Ef2x Iii 2x Teleconverter
Delivery $113.06
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Canon Extender Ef2x Iii
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Canon Ef Extender 2x Mk 3 Iii 2.0 X Lens Teleconver
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Canon Extender Ef2x Iii
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Used Canon Extender EF 2x III (NO FRONT CAP) - Good
Delivery $34.72
Used Fair Canon EF 2.0x III Super Telephoto Extender - White
Delivery $41.67
Used Canon Tele Extender EF 2x III - Excellent
Delivery $34.72
originally posted on ebay.com
Item arrived promptly in condition as described. I have used it a couple of times already and I am very impressed with the image quality. However a word to the unwary - although the image stabiliser on my lens still functions normally, autofocus does not when the extender is in place, but I can cope with manually focussing images on the few occasions that I use the extender.
originally posted on canon.com
I bought this about one month ago, and I have only tried it with my old 5D Mark II. I'm not sure how well it works with newer cameras, but from what I saw it was NOT worth the $400 price tag. First of all, it is very limited in terms of which lenses you can pair it with. It is very easy to use, and convenient, BUT only works with certain L lenses. Secondly, as you probably already know, it cuts the max aperture you can use in half, so that REALLY REDUCES the effective speed of your lens, making it NOT a great choice for low light. The sample photso I tried all looked dull and blurry, NOT as sharp as the original lens itself. So maybe it's OK for ideal situations, on a very bright day, outdoors, where you can use low ISO and faster than 1/1000th shutter speed MAYBE ... MoreI bought this about one month ago, and I have only tried it with my old 5D Mark II. I'm not sure how well it works with newer cameras, but from what I saw it was NOT worth the $400 price tag. First of all, it is very limited in terms of which lenses you can pair it with. It is very easy to use, and convenient, BUT only works with certain L lenses. Secondly, as you probably already know, it cuts the max aperture you can use in half, so that REALLY REDUCES the effective speed of your lens, making it NOT a great choice for low light. The sample photso I tried all looked dull and blurry, NOT as sharp as the original lens itself. So maybe it's OK for ideal situations, on a very bright day, outdoors, where you can use low ISO and faster than 1/1000th shutter speed MAYBE this is a good choice, but otherwise I would RATHER just use a APS-C crop sensor to get a nice zoom result.
originally posted on ebay.com
I use this on a Canon 70-200 F2.8 L II. It makes the f2.8 aperture setting become an aperture of f5.6 which is perfect for most situations for me anyway. I do not see any degradation of sharpness. I use it for nature and wildlife mostly. Looked at buying a 100-400 lens but decided to try this first to get the 400mm reach, works perfectly, and AF is just fine, perfectly tuned for wildlife, even catching eagles in flight. I use this with a Canon 5Ds camera, and have no issues at all. I crop heavily and love the results. It fits beautifully, no wiggle or loose feeling at all. Comes off and on lens and camera smoothly. My understanding is that this version iii is really better than the I or II versions, it was built from the ground up to match the zoom L lens perfectly. ... MoreI use this on a Canon 70-200 F2.8 L II. It makes the f2.8 aperture setting become an aperture of f5.6 which is perfect for most situations for me anyway. I do not see any degradation of sharpness. I use it for nature and wildlife mostly. Looked at buying a 100-400 lens but decided to try this first to get the 400mm reach, works perfectly, and AF is just fine, perfectly tuned for wildlife, even catching eagles in flight. I use this with a Canon 5Ds camera, and have no issues at all. I crop heavily and love the results. It fits beautifully, no wiggle or loose feeling at all. Comes off and on lens and camera smoothly. My understanding is that this version iii is really better than the I or II versions, it was built from the ground up to match the zoom L lens perfectly. I don't use this with other lenses, so not sure how a prime L lens would work with the extender. Hand holding the 5Ds with the extender and 70-200 f2.8 L is not difficult, balances well and I have no problem hand holding the setup. It is a perfect flexible option for my 70-200 L to get me that 400mm reach and it is money well spend!
| Lens system | |
| Lens mount interface | Canon EF |
| Lens type | Extender |
| Lens structure (elements/groups) | 9/5 |
| Component for | SLR |
Canon 4410B002 Extender 2-2mm 35mm Lens for Canon EF Cameras
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Canon Extender EF 2X III Lens
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Canon Extender Ef 2x Iii Teleconverter Lens For Ef Eos From Japan Mint
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Canon Extender Ef2x Iii 2x Teleconverter
Delivery $113.06
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Canon Extender Ef2x Iii
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Item arrived promptly in condition as described. I have used it a couple of times already and I am very impressed with the image quality. However a word to the unwary - although the image stabiliser on my lens still functions normally, autofocus does not when the extender is in place, but I can cope with manually focussing images on the few occasions that I use the extender.
I bought this about one month ago, and I have only tried it with my old 5D Mark II. I'm not sure how well it works with newer cameras, but from what I saw it was NOT worth the $400 price tag. First of all, it is very limited in terms of which lenses you can pair it with. It is very easy to use, and convenient, BUT only works with certain L lenses. Secondly, as you probably already know, it cuts the max aperture you can use in half, so that REALLY REDUCES the effective speed of your lens, making it NOT a great choice for low light. The sample photso I tried all looked dull and blurry, NOT as sharp as the original lens itself. So maybe it's OK for ideal situations, on a very bright day, outdoors, where you can use low ISO and faster than 1/1000th shutter speed MAYBE ... MoreI bought this about one month ago, and I have only tried it with my old 5D Mark II. I'm not sure how well it works with newer cameras, but from what I saw it was NOT worth the $400 price tag. First of all, it is very limited in terms of which lenses you can pair it with. It is very easy to use, and convenient, BUT only works with certain L lenses. Secondly, as you probably already know, it cuts the max aperture you can use in half, so that REALLY REDUCES the effective speed of your lens, making it NOT a great choice for low light. The sample photso I tried all looked dull and blurry, NOT as sharp as the original lens itself. So maybe it's OK for ideal situations, on a very bright day, outdoors, where you can use low ISO and faster than 1/1000th shutter speed MAYBE this is a good choice, but otherwise I would RATHER just use a APS-C crop sensor to get a nice zoom result.
I use this on a Canon 70-200 F2.8 L II. It makes the f2.8 aperture setting become an aperture of f5.6 which is perfect for most situations for me anyway. I do not see any degradation of sharpness. I use it for nature and wildlife mostly. Looked at buying a 100-400 lens but decided to try this first to get the 400mm reach, works perfectly, and AF is just fine, perfectly tuned for wildlife, even catching eagles in flight. I use this with a Canon 5Ds camera, and have no issues at all. I crop heavily and love the results. It fits beautifully, no wiggle or loose feeling at all. Comes off and on lens and camera smoothly. My understanding is that this version iii is really better than the I or II versions, it was built from the ground up to match the zoom L lens perfectly. ... MoreI use this on a Canon 70-200 F2.8 L II. It makes the f2.8 aperture setting become an aperture of f5.6 which is perfect for most situations for me anyway. I do not see any degradation of sharpness. I use it for nature and wildlife mostly. Looked at buying a 100-400 lens but decided to try this first to get the 400mm reach, works perfectly, and AF is just fine, perfectly tuned for wildlife, even catching eagles in flight. I use this with a Canon 5Ds camera, and have no issues at all. I crop heavily and love the results. It fits beautifully, no wiggle or loose feeling at all. Comes off and on lens and camera smoothly. My understanding is that this version iii is really better than the I or II versions, it was built from the ground up to match the zoom L lens perfectly. I don't use this with other lenses, so not sure how a prime L lens would work with the extender. Hand holding the 5Ds with the extender and 70-200 f2.8 L is not difficult, balances well and I have no problem hand holding the setup. It is a perfect flexible option for my 70-200 L to get me that 400mm reach and it is money well spend!
I bought this extender specifically for the total lunar eclipse of January 20-21, 2019, to use with my Canon 200-400 zoom. My intent was to make the image of the moon as large as possible for maximum clarity. I had reservations as to how successful I would be with this combination, but decided to make the plunge after reading an on-line review of this specific lens combination. I realize that, in theory, the extender does not result in as clear an image as a standard lens of similar focal length, but I am quite happy with the results. I have compared my best images using the 200-400 lens with and without the built-in 1.4x extender, and then attaching the 2x extender. If there is any loss in clarity, it is more than compensated by the added pixel detail from the ... MoreI bought this extender specifically for the total lunar eclipse of January 20-21, 2019, to use with my Canon 200-400 zoom. My intent was to make the image of the moon as large as possible for maximum clarity. I had reservations as to how successful I would be with this combination, but decided to make the plunge after reading an on-line review of this specific lens combination. I realize that, in theory, the extender does not result in as clear an image as a standard lens of similar focal length, but I am quite happy with the results. I have compared my best images using the 200-400 lens with and without the built-in 1.4x extender, and then attaching the 2x extender. If there is any loss in clarity, it is more than compensated by the added pixel detail from the closer image. Photos taken of the moon using the lens combination proved to be noticeably superior to those taken with the zoom lens alone, both at 400mm and 560mm (using the built-in 1.4x extender). One issue to note is that the lens does not auto focus with the lens combination using the built-in 1.4x extender, because the resulting aperture of f/11 does not allow for auto focus to function. Auto focus does operate without use of the 1.4x built-in extender, however. All my lunar eclipse photos were taken at maximum focal length (1120mm) using the internal (1.4x) and external (2x) extenders together. This required use of precise manual focus with my Canon EOS 5D Mark IV live view 10x zoom function, which became more and more difficult as the moon light subsided. In hindsight, perhaps I should have also tried autofocus without using the 1.4x internal extender (800mm focal length, f/8 aperture) and compared those images. But that's for another time. I have also tried the 2x extender with my Canon 100-200 f/4 zoom and found it easy to take hand held shots with rapid auto focus, perfect for wildlife and outdoor sports photography where portability is a must. Needless to say, I am happy with my purchase and eager to to experiment with its use in a wide variety of photographic projects in the future.
I've had some bad experiences over the years with 1.5 and 2x extenders, so I've stayed away. But I had occasion to need one recently when weight restrictions dictated I could not take the 400mm and the 600mm along, so I opted for the EF 2X III. After waiting 4 months and getting nothing but 'out of stock' (not only from B&H, but every outlet on the planet, time was drawing near so I had to make a decision. I saw that B&H had the 'gray market' model in stock, so I ordered it and cancelled the order for the US version. I had read from Canon that the two items are identical in every way from the assembly line they are put together to the raw materials and the glass. One has the US Warranty, the other doesn't. Same price. When it arrived, I immediately put it to the ... MoreI've had some bad experiences over the years with 1.5 and 2x extenders, so I've stayed away. But I had occasion to need one recently when weight restrictions dictated I could not take the 400mm and the 600mm along, so I opted for the EF 2X III. After waiting 4 months and getting nothing but 'out of stock' (not only from B&H, but every outlet on the planet, time was drawing near so I had to make a decision. I saw that B&H had the 'gray market' model in stock, so I ordered it and cancelled the order for the US version. I had read from Canon that the two items are identical in every way from the assembly line they are put together to the raw materials and the glass. One has the US Warranty, the other doesn't. Same price. When it arrived, I immediately put it to the test and found it more than acceptable. I used it on my 70-200 f/2.8 and was really surprised how well it worked on a zoom lens. I had originally believed they were only compatible with fixed focal length lenses, but Canon said the 70-200 was one of the exceptions. I couldn't be happier. I've added the metadata file from Photoshop from the 2 submitted images so you can see the configuration and how well it works.
I waited three months for this on backorder, and it finally came - in perfect condition as always from B&H. Haven't used it a great deal yet, but did test it out along with its little brother the EF 1.4X III purchased at the same time but received three months earlier. On a partly cloudy/bright day I took a photo with my EF 70-200 f/2.8L IS USM III mounted on my 80D. Then I took the same photo from the same location with the addition of the 1.4 Extender. Finally I took the same photo with the 2.0 Extender replacing the 1.4. All were hand held with my elbows supported on a firm surface. The pictures were extremely good. Sharp focus with no noticeable blur. Auto-focus in every case was quick with no hunting. Focus slowdown with the two extenders was not easily ... MoreI waited three months for this on backorder, and it finally came - in perfect condition as always from B&H. Haven't used it a great deal yet, but did test it out along with its little brother the EF 1.4X III purchased at the same time but received three months earlier. On a partly cloudy/bright day I took a photo with my EF 70-200 f/2.8L IS USM III mounted on my 80D. Then I took the same photo from the same location with the addition of the 1.4 Extender. Finally I took the same photo with the 2.0 Extender replacing the 1.4. All were hand held with my elbows supported on a firm surface. The pictures were extremely good. Sharp focus with no noticeable blur. Auto-focus in every case was quick with no hunting. Focus slowdown with the two extenders was not easily discerned.= if any at all. I took the. following precautions. Turn off the camera when changing the lens and/or the extenders. Always mounting the extender to the lens first, and then the combo to the camera. Removal in reverse order. I think I understand the logic of Canon recommending this method of installing and removing the extenders. My son tried the same thing with his T6S and his 70-200 zoom. He took photos at night in his normally lighted kitchen, hand held also. Again no noticeable focusing delay. We were impressed with the clarity of the photos. Now this was hardly an exhaustive and rigorous test of the extenders, but did show that casual but careful use of the extenders can produce excellent results. Thanks to the 1.6 crop of our APS-C bodies we were able to achieve 640mm for a lot less than buying a 400mm lens. I am sure we will experience incidences of less than satisfactory results at times, but properly used the Canon Extenders are top notch.
The extra reach in focal length is appreciated and auto focus works reasonably well (on 400mm f/2.8) to track moving object like birds in flight.The image quality it produces along with Canon's best super telephoto lenses still leaves some gap between my expectation and reality. Image quality with 1.4x is more acceptable most of the time by my standard. With 2x it can create some very good images but not great and a bit more masking and sharpening are often needed for my taste.2x on a zoom such as the great 70-200mm f/2.8L IS USM II or III, the result is barely OK. After tried it a couple of times in different location/lighting conditions, I gave up the idea of using 2x on any zoom lenses.A 2x teleconverter will just magnify your host lens' flaw to a more ... MoreThe extra reach in focal length is appreciated and auto focus works reasonably well (on 400mm f/2.8) to track moving object like birds in flight.The image quality it produces along with Canon's best super telephoto lenses still leaves some gap between my expectation and reality. Image quality with 1.4x is more acceptable most of the time by my standard. With 2x it can create some very good images but not great and a bit more masking and sharpening are often needed for my taste.2x on a zoom such as the great 70-200mm f/2.8L IS USM II or III, the result is barely OK. After tried it a couple of times in different location/lighting conditions, I gave up the idea of using 2x on any zoom lenses.A 2x teleconverter will just magnify your host lens' flaw to a more visible level. You can get away with it only if the lens you put on top of it has superior image quality to begin with. Therefore, it pretty much only works good enough for 300, 400, 500 and 600mm super telephotos, or 800mm with auto-focus. Yes, I am still using it (only with super telephoto) when there's no better alternatives.
Bought this 2x extender and attached between Canon 300 f/2.8 L is2 lens and 7Dmii body. None of my tripod photos have been in focus ...yet. Suspect I'll need to download Canon corrections peculiar to this combo and make micro adjustments to focal point. Hopefully that'll help.
I normally don't do nature photography so I never needed to invest in a long lens. However my recent circumstances have made such photography more available and appealing. But I didn't want to spend a lot on a lens. I'm using my Canon 70-200, 1.4 for long shots and decided to try the 2X III Extender as a much less expensive alternative. I was pleased with the results. The literature states f/8 is the lowest f/stop possible but I got f/5.6 at 400 mm. I attached it to my 5d Mark III. The downsides include the added length and weight and loss of three stops. However the work around is to put it on a tripod or put the camera down whenever feasible and shoot at higher ISO settings. The upsides, beside the low cost, include continued use of all the lens' controls, ... MoreI normally don't do nature photography so I never needed to invest in a long lens. However my recent circumstances have made such photography more available and appealing. But I didn't want to spend a lot on a lens. I'm using my Canon 70-200, 1.4 for long shots and decided to try the 2X III Extender as a much less expensive alternative. I was pleased with the results. The literature states f/8 is the lowest f/stop possible but I got f/5.6 at 400 mm. I attached it to my 5d Mark III. The downsides include the added length and weight and loss of three stops. However the work around is to put it on a tripod or put the camera down whenever feasible and shoot at higher ISO settings. The upsides, beside the low cost, include continued use of all the lens' controls, remarkably sharp images for an extender and of course getting to 400 mm. I set the shutter speed at 1/1000 and as usual complete the final focus adjustment manually and with the UV filter removed. I'm pleased with the results and am comfortable with printing images for use in my home as well as making them available for sale. For the money, a great value.
Our photo group planned an outing at a wildlife refuge so I thought that my Canon 70-200mm might need more reach. I wasn't ready to commit to a longer lens so the extender seemed like it might work. At the wildlife refuge I found that focusing took longer and really required manual focus, so not as helpful as I envisioned. It will be great for better photos of our backyard feeder where manual focus and a tripod work just fine. One of these days, I'll probably opt for a longer lens...
| Lens system | |
| Lens mount interface | Canon EF |
| Lens type | Extender |
| Lens structure (elements/groups) | 9/5 |
| Component for | SLR |
