Let's take a look at the Canon EF 2x III Extender mounted on a camera body. but being able to shoot at a second focal length is a nice option. The Canon EF Extender 2x III is designed to provide extended range with Canon L-series telephoto lenses. IMG12.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/Canon-Extender-EF-2x-III-On-Camera.jpg' This item is no longer available in new condition. The mounted extender also shifts the lens weight forward slightly for a potential change of balance. Considering that an extender can have nearly $20,000 worth of camera and lens attached to it, the extra strength insurance can be appreciated. These results show what a very sharp lens, stopped down to f/11 and used with good lighting can produce with extenders. SKU: 3479188 . The Extender 2x II did not have an issue with CA and neither does the III. The primary reason to use any extender is of course to gain a longer focal length/narrower angle of view from a lens – to frame the subject more tightly. IMG5 = new Image(604, 404) Of course, to get an extender at all is the first decision to make. Buy a lens with the native focal length you need for best results. Before you immediately conclude that this is a problem, understand that this reduction in drive speed now corresponds to the effective speed you would achieve with the same EF lens alone. Canon TS-E 90mm f/2.8 Tilt-Shift Lens. 200 millimeters. IMG9 = new Image(604, 404) Genuine Canon camera accessory with same day delivery in Hong Kong Two additional lenses in the same number of groups (9/5 vs. 7/5) are found in the III (and likely contribute to the slightly increased weight). (629) It compensates, automatically, for the reduced distance lens elements in the lens’s focusing group(s) need to move to refocus on a subject, with either EF Extender in place. Note that Canon does not recommend stacking extenders. This is due to improvements in AF precision made possible by the new microcomputer in the extenders.". when any 2x extender is attached: f/2.0, f/2.8, f4.0, f/5.6, f/8.0, f/11, f/16. Because the Canon EF 2x III Extender is multiplying the aberrations/flaws of the lens it is mounted behind by 2x and because there are now 9 The biggest downside to using a 2x extender, in my opinion, is the image quality reduction it causes. more impacting, a decrease in image quality and maximum aperture. You expect to get what you ordered, and you want to pay a low price for it. Canon Extender EF 2x III Deals. [Canon] Also impressive is the resulting image quality in these extender examples. In this review, I do a review of the Canon Extender 2x III teleconverter. IMG3 = new Image(604, 404) My personal opinion is that the 2x III's improvements are worth the difference in price, but we all value our images and money differently. The Canon EF 2x III Extender does not go with me nearly as frequently, but I occasionally take it along too. Do you need more macro magnification from your Canon EF 180mm f/3.5L Lens? Canon EF 600mm f/4.0L IS USM Lens This lens is only compatible with fixed focal length L-series lenses 135mm and over, as well as the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L, and EF 100-400/4.5-5.6L. Canon EF 180mm f/3.5L USM Macro Lens becomes a 360mm f/7.1 USM Macro Lens. When used with a compatible lens, they will multiply the focal length of the lens by a factor of either 1.4x or 2x, at the cost of decreasing the lens' aperture by 1 or 2 stops respectively. The Canon 180 L Macro is a lens that performs very well with extenders. Canon EF 500mm f/4.0L IS USM Lens The above images (of a Christmas Cactus flower) were taken from the same tripod-mounted position (using the tripod ring) with a ISO 12233 Resolution Chart Tool. I don't use extenders a big percentage of the time, but I often have a 1.4x with me. when used with the Canon IS Supertelephoto Series II lenses mentioned above and (I expect) all future compatible lenses. The 2x II added pincushion distortion to the lens it was used with whereas the 2x version III adds slight barrel distortion. Info. Not available as I create the Canon EF 2x III Extender review are the announced: Canon EF 300mm f/2.8L IS II USM Lens, Note that barrel distortion causes the center portion of the image (top image in the ISO 12233 tool) to be slightly enlarged, IMG2 = new Image(604, 404) It features a built-in microcomputer for seamless communication among camera body, lens and extender. Canon EF 400mm f/2.8L USM Lens (non-IS) Additionally, please see the lens and/or camera body manual for full compatibility information with the Extender EF 2X III. IMG9.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/14x-Extender-20x.jpg' I would also only consider the combination if the body I plan to use was released at least several months before the Sigma lens. Model: 4410B002 . Renting is fast and easy. The III's new color matches Canon's latest white L lenses. Here is a link to the list of Canon lenses compatible with Canon extenders. Key Specs. IMG8 = new Image(604, 404) IMG10 = new Image(600, 404) Lens Mount Compatibility. See similar items below. The Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. Extenders do not affect the MFD (Minimum Focus Distance) of the lens they are mounted behind, Here is the list of these lens reviews – which is also the comprehensive-at-review-time list of currently available extender compatible Canon lenses. As a rule, but subject to change, the Canon lenses compatible with the Canon EF 2x III Extender include fixed focal length L lenses with focal lengths of 135mm and longer, zoom L lenses with at least 70mm of focal length on their wide end (the Canon EF 70-300mm f/4-5.6L IS USM Lens excluded). DSLR cameras will continue to calculate auto exposures properly when used with Canon Extenders. Compare the native maximum focal length to the extended focal length to see the optical change from the selected combination. Compatibility Designed to extend a lenses focal length by a factor of 2x, the redesigned Canon Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. Or, would you feel more comfortable buying after having a hands-on trial period? Canon TS-E 17mm f/4L Tilt-Shift Lens The front and rear elements have Canon's fluorine anti-smear coating – making them very easy to clean. Canon EF 1200mm f/5.6L USM Lens. //End comment tag.-->, Bringing you this site is my full-time job (typically 60-80 hours per week). 70 millimeters. The length and weight of this combination means no hand held, tripod only. The TTL auto focus does not function, BUT, with the ground breaking dual pixel CMOS in the Canon 70D, I can use the lens's auto focus in LIVE VIEW. Specifications. The lens and extender combo can always be used in manual focus mode, but a narrow max aperture (f/11 for the f/5.6 lenses) Canon Extenders only fit a limited range of EF lenses – essentially L-series primes with a focal length of 135mm or more and L-series zooms with a minimum focal length of 70mm. Shop online for Canon Extender EF 2x III at Canon UK Store. EOS 1Ds Mark III EOS 20D EOS 1D Mark II EOS 1D Mark II N Home Articles Articles Detail. The Series III extenders include some durability improvements. (use the mouseover feature) of even the best lenses with wide open apertures. - Bryan, My Recommended Canon EF 2x III Extender Retailers, More Canon EF 2x III Extender Related Information. Canon EF 70-200mm f/4.0L USM Lens IMG1 = new Image(604, 404) This is the lone, but very significant, advantage provided by extenders. Key features include: Improved optical performance. The Extender EF 2X III from Canon is designed for select Canon EF mount L-series telephoto lenses. The image quality of lenses varies from model to model; and therefore, the optical results of the various with-extender combinations also vary. A 2x teleconverter (such as the Yongnuo EF 2X III teleconverter) will double the apparent focal length at the expense of two stops of light. If you are tracking birds in flight, fast sports action at relatively short distances or shooting low contrast subjects in low light, expect a noticeable AF performance decrease. Canon EF 180mm f/3.5L USM Macro Lens on a IMG5.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/14x-Extender-100.jpg' Canon EF 400mm f/2.8L IS USM Lens Canon EF 180mm f/3.5L USM Macro Lens Enjoy focal length extension for super telephoto lenses Compatible with most telephoto and zoom lenses within Canon's flagship professional L-series, the Canon Extender EF 2x III is a great kit addition. (and this is of course only true when you do not want the entire native lens' FOV). Note that "AF precision remains the same as the Series II Extenders when the Series III Extenders are used with earlier extender-compatible EF lenses." Canon EF 70-200mm f/2.8L IS II USM Lens No EF-S lenses are compatible with any version of the Canon Extenders. an extension tube installed between them makes the fit possible. Ultra-Popular Sigma 18-35mm f/1.8 DC HSM Art Lens in the Adorama Deals of the Day — Save $220.00! While they do not fit together due to the lack of space at the rear elements, The series III extender results are the last set (with 1.4x III and with 2x III) of focal lengths available for each lens. Said another way, you generally will get better results from a 400mm lens than with a 200mm lens plus the Canon EF 2x III Extender, If it is, the resulting 2x focal length is very impressive. Attempting to mount a Canon extender on these same non-compatible lenses can damage the lens due to contact being made with the rear lens element. Using extenders to save space when traveling or hiking can be a good decision. The following list of discontinued lenses fitting these parameters are compatible, but may require camera microfocus calibration for accurate focusing (note that not all DSLR cameras support microfocus calibration): Canon EF 200mm f/1.8 L USM Lens A microcomputer integrated into the Series III Extenders promises faster autofocusing and increased AF precision Some of the extender-compatible lenses start with an f/5.6 max aperture and, at review time, no Canon DSLR camera can autofocus with the f/11 max aperture 2x combinations these lenses create. Since many Canon EOS camera bodies need a max aperture of f/5.6 or wider to autofocus, losing 2 stops of max aperture pushes f/4 and narrower lenses past their ability to autofocus. Sports and wildlife are two of the most common photography pursuits utilizing extenders. but it comes with an image quality penalty. Ending: Topaz Labs Holiday Sale: Save 30% + 15% Off All Products, Bundles, and Upgrades Sitewide Now! The Extender EF 2x III is compatible with most telephoto and telephoto zoom lenses within Canon’s flagship professional L-series range, extending the focal length while only reducing the effective aperture of the lens by two stop. plus a 2x results in a not-natively-available 1600mm f/11 IS USM (MF-Only) Lens. The Canon Extender EF 2x III mounts between your camera body and lens in order to give your lens more reach through magnification. Canon TS-E 24mm f/3.5L II Tilt-Shift Lens Better optical quality is also expected. These lenses are used between any compatible EF type lens and any of the Canon EOS line of cameras. Canon TS-E 45mm f/2.8 Tilt-Shift Lens But, saving money is one of the reasons to buy an extender instead of a lens with a longer native focal length. with by 2.08" (52.7mm) and increases the weight by 12 oz (325g). EF 2x III Extender for DSLR cameras for double focal length from the Canon Hong Kong online store. Integrated processor. Accordingly, overall AF performance remains essentially unchanged with an EF Extender attached, versus the lens’s AF speed without an extender.". Canon extenders simply do not fit behind the rear lens element on Canon's non-extender-compatible lenses. IMG2.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/14x-Extender.jpg' Buying an extender over a longer lens for financial reasons can also make sense. Canon EF 800mm f/5.6L IS USM Lens So, a 300mm lens beomes a 420mm with a 1.4x TC and a 600mm lens with a 2x TC. Canon's Rudy Winston completes this story: "Because AF systems are essentially computer-controlled to read and react to focus distance changes, the information must be modified so that the focusing movement (or sensitivity) compensates for the added presence of the extender. I did not notice any differences in this regard. IMG7.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/No-Extender-14x.jpg' At review time, the price differential between the still-available version II extenders and the version IIIs is rather high. What types of photography are extenders used for? The Sigma lens was released in February 2010, the Canon EF 2X III was released in August 2010, so there may well be some compatibility issue there. so the MM (Maximum Magnification) of the lens is also multiplied by 2x. IMG10.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/Lens-Only.jpg' I am grateful for your support! creates a very dark viewfinder that makes manual focusing difficult. Canon Extender EF 2x III. but as their image quality results shown on their reviews show, they can function with extenders. The Canon EF 2x II Extender is an easy and very affordable way to dramatically extend the reach (focal length) of compatible Canon L Series lenses (and a few additional lenses). With good lenses mounted on a 1-Series body and high-contrast subjects selected for AF, I'm not finding the 2x III AF speed a problem. A significant disadvantage brought by the use of a 2x extender (any of brand or model of them) is that your lens' max aperture setting Canon EF 400mm f/2.8L II USM Lens (non-IS) About the Canon Extender EF 2x II View the manual for the Canon Extender EF 2x II here, for free. Make Offer - Near Mint w/Pouch Canon Extender EF 1.4X Teleconverter Lens EF Mount from Japan Canon EXTENDER EF 2X Teleconveter for EOS EF Mount Tele Converter JAPAN 4CHARITY $227.97 The 2x III adds a small amount of barrel distortion to the lens it is being used with. The latest versions are the Extender EF 1.4x Mark III and the Extender EF 2x Mark III. Just one of the many great deals in Lens Adapters, Converters & Extenders. Free shipping on all orders over £30! IMG6.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/2x-Extender-100.jpg' The teleconverters (TC) will multiply the focal length of any EF lens used with them by either 1.4x or 2x. Note that the only lenses with focal lengths below 135mm that are compatible are the 70-200mm L series variants and the 100-400mm L. All of the compatible prime lenses are also L series lenses. as you can see below, there are now 7 (instead of 4) screws holding the rear lens mount to the body. Canon EF 100-400mm f/4.5-5.6L IS USM Lens It multiplies your focal length by 2x and makes your effective aperture two stops less. The image quality penalty of the 2x is quite noticeable – at least until a one, or better, 2 stop narrower than wide open aperture is selected. Lens Specifications and Measurements Tool, Canon EF 100-400mm f/4.5-5.6L IS USM Lens, Canon TS-E 24mm f/3.5L II Tilt-Shift Lens, Canon EF 2x III Extender USA Press Release, » Canon EF 14mm f/2.8L II USM Lens Review. The 2x III grew 2.6 oz (75g) heavier than, and is .21" (5.3mm) shorter than, the the values to the right show Photoshop CS5 up-rezzed (resized larger) images created from the native image. Canon EF 500mm f/4L IS II USM Lens and Get your Canon EF 2x III Extender now! The 2x III is similar to the 1.4x III and these reviews were prepared simultaneously. The image quality differences most easily noticed between the 2x II and the 2x III are: Results with the Extender 2x III are overall slightly sharper than the Extender 2x II with a difference being most noticeable in the mid-frame and corner areas. Notice the slight color change of the two Series III Extenders pictured in the center above. Always check the Lens Specifications and Measurements Tool for the most update-to-date compatibility specs. A great lens will typically produce the best image quality when used with the 2x and Article ID: ART158961 | Date published: 06/09/2015 | Date last updated: 09/11/2018 . And I'm sure that not everyone can justify the cost difference to go with the 2x III over the 2x II. It increases the focal length of a lens by a factor of 2x while still delivering superb image quality. The Extender 2x III has Canon’s Super Spectra coating for reduced ghosting and flare. It makes your 70-200/2.8 into a 140-400mm f/5.6, or your 300mm f/2.8 into a 600mm f/5.6. The high-performance Canon Extender EF1.4X III and Extender EF2X III increase the focal length of the attached EF lens by 1.4X and 2X respectively. List of lenses that are compatible with the EF 1.4x II and EF 2x II extenders. Description. Canon EF 600mm f/4L IS II USM Lens. Since many telephoto zoom lenses have pincushion distortion at their longest focal lengths, the added barrel distortion can Extender EF 1.4X III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of Canon super telephoto lenses. The Canon EF 2x III Extender reduces contrast and sharpness When Extender EF 2X III is used, AF drive speed is reduced by 75%. IMG1.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/No-Extender.jpg' IMG4 = new Image(604, 404) Canon EF 70-200mm f/2.8L IS II USM Lens Canon EF 2x Extender II it replaces. Canon EF 135mm f/2.0L USM Lens Fluorine coating on front and rear elements Note that this extender reduces your maximum aperture by … IMG7 = new Image(604, 404) and the lens it is being inserted into if your alignment is off when mounting the extender to a compatible lens. The Canon Extender EF 1.4x III extends a lenses focal length by a factor of 1.4x. Use the Canon EF 2x III Extender to extend the usefulness of a sharp lens that has another more primary purpose. Combining the focal length multiplier and the maximum aperture reduction provides your resulting lens equivalent. Canon EF 70-200mm f/2.8L USM Lens IMG11.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/Canon-Extender-EF-1.4x-III-On-Camera.jpg' Photojournalism, law enforcement and many other types of photography can also make good use of them. Use the ISO 12233 chart results from the lens you are interested in using the 2x with – and decide for yourself if the resulting image quality is acceptable to you. Canon EF 16-35mm f/2.8L II USM Canon MP-E 65mm f/2.8 1-5x Macro Photo Macro Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto Canon EF 70-200mm f/2.8L IS II USM Canon EF 70-200mm F/4L USM Canon EF 50mm f1.4 USM Canon EF 85mm f/1.8 USM Canon EF 100-400mm f/4.5-5.6L IS USM Telephoto Zoom Canon Extender 1.4 III Quantaray 18-200mm 1:3.5-6.3 (Using the links on this site to make any purchase provides. The Canon extenders have a protective rubber ring around the front element to protect both the extender itself But, Canon does not recommend using ETs at all due to reduced autofocus accuracy. IMG3.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/2x-Extender.jpg' 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. The retailers I recommend below are the ones I trust for my purchases. Thus, I depend solely on the commissions received from you using the links on this site to make any purchase. The difference in framing (angle of view) is quite noticeable between the three examples shown. Canon EF 300mm f/4.0L IS USM Lens Canon EF 200mm f/2.0L IS USM Lens It is ideal for photojournalists and … The rental companies I recommend below are excellent to work with. document[imgDocID].src = eval(imgObjName + '.src'); Canon EOS 5D Mark II camera body. This Canon Extender 2x II is an ultra high performance teleconverter for use with Canon's high-performance telephoto lenses on all Canon EOS digital and 35mm cameras. Shooting with the Canon EF 2x III Extender mounted results in reduction of autofocus speed. Additionally, please see the lens and/or camera body manual for full compatibility information with the Extender EF 2X III. "As with previous EF Extenders, usage of Series III EF Extenders lowers AF drive speed to improve AF performance. The zoom and focus rings are of course shifted away from the camera body the same amount as the lens. Canon EF Extenders / Teleconverters The range of Canon 1.4x and 2x lens extenders. As a rule, but subject to change, the Canon lenses compatible with the Canon EF 2x III Extender include fixed focal length L lenses with focal lengths of 135mm and longer, the best way to see how specific extender+lens combinations perform is by using the Due to having incompatible signal relay systems, film SLRs are not compatible with the Series III Extenders (the EOS-1V is the only exception). The Canon EF 2x III Extender mounts between your Canon EOS Digital SLR and a compatible lens For example, a 2x extender (also commonly referred to as a teleconverter) makes a Hi, I have just purchased a Canon EF 2X III teleconverter, it's between a Canon 70D and a Canon EF 100-400mm IS-L USM lens. Canon EF 300mm f/2.8L IS USM Lens Add the Canon EF 2x III Extender to the setup for a 360mm 2:1 (2x) Macro lens. Maximum Focal Length. Outstanding image quality at double the distance Canon EF. When Extender EF 1.4X III is used, AF drive speed is reduced by 50%. According to Chuck Westfall (Canon USA): In the Canon EOS system, this is done by deliberately reducing drive speed when an extender is detected. IMG4.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/No-Extender-100.jpg' IMG11 = new Image(600, 404) Schedule your rental now! For example, a Canon EF 800mm f/5.6L IS USM Lens Improvements in the Series III extenders promise to perform especially well on these specific lenses. While some third party extenders *may* work properly with Canon's non-extender-compatible lenses, they probably will not report the reduction in aperture. It delivers seamless communication among camera body, lens and extender, and features coatings to … The Canon EF 2x III Extender significantly extends the reach of your sharp, compatible Canon lenses for a relatively low size, weight, and financial cost - So, pick your lens' maximum aperture opening from the following list and understand that it will shift two values to the right If the prices were equal, there would be no question that the III is the extender version to get. IMG6 = new Image(604, 404) Canon EF 200mm f/2.8L II USM Lens Anomalous dispersion glass elements are used in the Series III extenders to reduce chromatic aberration and increase resolution and contrast. IMG8.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/No-Extender-20x.jpg' zoom L lenses with at least 70mm of focal length on their wide end (the Canon EF 70-300mm f/4-5.6L IS USM Lens excluded). Info. The very long focal length lenses are considerably more expensive than extenders. The Canon Extender EF lenses are a group of teleconverter lenses made by Canon. Consider renting. This lens is only compatible with fixed focal length L-series lenses 135mm and over, as well as the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L, and EF 100-400/4.5-5.6L. Canon EF 400mm f/4.0 DO IS USM Lens A Canon EF 70-200mm f/4.0L Lens mounted over a 2x becomes a 140-400mm f/8 lens. Info. similar to Canon L Lenses in construction quality. For example, using a 1.4x or 2x extender with the Canon EF 500mm f/4L IS USM would result in a 700mm f/5.6 or 1000mm f/8 lens. The first task I undertook upon purchasing (retail) my 2x III was to add the with-extender-III ISO 12233 resolution chart results What's in the Box Designed to extend a lenses focal length by a factor of 2x, the redesigned Canon Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. IMG12 = new Image(600, 404) Canon EF 70-200mm f/4.0L IS USM Lens This review will sound very similar to the Canon 1.4x Extender Review, but the 2x function is basically the same.. CNN_2x III Extender Lens_CanonDSLR Special Features This lens is only compatible with fixed focal length L-series lenses 135mm and over, as well as the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L, and EF 100-400/4.5-5.6L. Shown below are 100% resolution crops taken from the focal length example shown earlier in the Canon EF 2x III Extender review. Each row below the image represents either the bare lens or the lens with the specified extender mounted behind it. Canon EF 400mm f/2.8L IS II USM Lens, Canon TS-E Tilt-Shift lenses are not included on Canon's official compatibility chart and do not have the 3 additional gold lens contacts for communicating extender information to the camera, DSLR atofocus support of an f/8 max aperture lens and extender combination varies, ranging from not supported at all to supported, though potentially with reduced AF point capability. Often better (when available) is to use Live View AF, which is generally supported with f/11 max aperture lens combinations. All current extender-compatible lenses have ISO 12233 chart results from the with-extender combinations available (select the longest with-extender focal length value). ôb®\ #’mtuêNÌåÕ!Ö¬c¢5ÕlN7¼¯B¤J!ÀèîC:œ{pê¦ „3r1nÖYWoi]VL‰Þ{‰B% œ>¶/Åí† q?Ú÷BÀ’Y?2+‹0Ú¤u§. counter the pincushion distortion to a small extent. It's a Good Day at B&H: Sigma 70-200mm f/2.8 OS Sports Lens – Save $400.00, SmallHD FOCUS Bolt 500 TX On-Camera Monitor – Save $800.00, More! is reduced/narrowed by a 2 stops – allowing at most 1/4 as much light into the exposure. My extender purchase advice is similar to the advice I gave in the Canon 1.4x EF Extender III Review. } Stopping the lens down one to two stops The lens mount release switch received a cosmetic upgrade, but functions the same. into a 140-400mm f/5.6 IS lens (yes, IS still functions normally on all compatible IS lenses). (primarily Canon L Series lenses), extending the focal length of the lens by a very noticeable 2x. Compatibility Designed to extend a lenses focal length by a factor of 2x, the redesigned Canon Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. Below are the Series II and III Extenders shown for comparison. And, as shown in my Canon EF 2x III Extender review examples above, the Another good reason to use an extender is to create a longer focal length lens than is available natively. Canon EF 500mm f/4.5 L USM Lens It is obvious that extenders produce better results than simply increasing the size of an image in Photoshop The Canon EF 2x III Extender increases the physical length of any combination it is used Then add an extender to give you an option to (less frequently) use longer focal lengths. They do not fit any EF-S lenses. These same lenses have results from the version II extenders and provide a lens-by-lens basis for comparisons between the two extender versions. Here is an example of the focal length increase provided by the 1.4x and 2x extenders.

Designed to extend a lenses focal length by a factor of 2x, the redesigned Canon Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. This may seem like a drawback, but in reality subject tracking performance remains quite high when Series III Extenders are used with IS II lenses. function switchimage(imgDocID, imgObjName) { Designed to extend a lenses focal length by a factor of 2x, the redesigned Canon Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. This is a 2× teleconverter for Canon's full-frame mirrorless system.. As of August 2020, it is only compatible with the Canon RF 100-500mm L IS, RF 600mm and RF 800mm lenses.. Additionally, please see the lens and/or camera body manual for full compatibility information with the Extender EF 2X III.