canon extender ii vs iiicanon extender ii vs iii

Extender Model: 1.4x II: 2x II: 1.4x III: 2x III: 1.4x II: 2x II: 1.4x III: 2x III: Actual Aperture: f/5.6: f/8: f/5.6 . A Canon EF 300mm f/2.8L IS Lens becomes a 600mm f/5.6 IS lens. -- It multiplies your focal length by 2x and makes your effective aperture two stops less. Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more and all is free. In each row, the left-most mouseover label is the native resolution of the combination and But how do you use them? It multiplies your focal length by 1.4x and makes your effective aperture one stop less. And their 1.4 extenders are no exception. I have the Mark II's that cost me about $200-$250 each, two or three years back. The colors produced by Nikon cameras are more accurate and true-to-life than those from Canon. But, Canon does not recommend using ETs at all due to reduced autofocus accuracy. . 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). Is the Canon 1.4 Extender III still a good option for you? -EF 28-70mm f/2.8L USM Buying an extender over a longer lens for financial reasons can also make sense. http://www.dpreview.com/news/1008/10082611canonef14xiiief2xiii.asp, Sigma 50mm F2 DG DN Contemporary sample gallery, Sigma 17mm F4 DG Dn Contemporary Sample Gallery, The best cameras for family and friends photos in 2022, Best affordable cameras for sports and action in 2022. While they do not fit together due to the lack of space at the rear elements, Canon EF 2x II Lens Extender Converter EXCELLENT EOS DIGITAL Camera l. $187.11 + $9.72 shipping. An Extender, or Teleconverter, is a lens accessory that fits between the camera body and lens, effectively increasing the focal length of the lens. Do you need more macro magnification from your Canon EF 180mm f/3.5L Lens? Will be coupled with EF 300mm f/4 L IS and a 7D Mark II -- maybe sometimes with an EF 70-200 f/4L IS and same body. EF 400mff /2..8 LUSMandIIa&b -EF28~105 mmf /35~ 4 .5 ~ 5 . IMG2.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/14x-Extender.jpg' I need more reach. - Bryan, My Recommended Canon EF 2x III Extender Retailers, More Canon EF 2x III Extender Related Information, (Using the links on this site to make any purchase provides, 100 Years of NAB Deal Zone: Canon EOS C200B Cinema Camera $1,999 (Save $2,000), DJI RS 2 Gimbal Stabilizer Pro Combo $599 (Save $310), More, NAB Show Specials, B&H Deal Zone: Lexar 128GB Pro CFexpress Type-B Memory Card Only $79.99 (Save $70.00), Manfrotto, More, Used Canon EOS R7 at B&H (<1,000 Shutter Actuations), Used RF 70-200mm F4 L Lens, Canon EOS C70 Firmware Update Version 1.0.6.1 Released, Just Posted: Sigma 23mm F1.4 DC DN Contemporary Lens Review, Coming Soon: Canon USA's Cadabra Curated Photography Marketplace, Just Posted: Sigma 50mm F2 DG DN Contemporary Lens Review, Sony Announces New SDK Version, Adding Remote Shooting and Camera Integration Features, 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. Were certainly not talking leaps and bounds in improvements here but I feel that there is definitely an improvement that can be noticed to someone who has shot a lot with the older MKIIs. Bogen/Manfrotto 3021 w/3265 ball-mount, http://www.usa.canon.com tArticleAct&articleID=266, http://www.usa.canon.com ArticleAct&articleID=3602. If youre a Canon user, then you know that the 1.4 extender iii is one of the most popular camera accessories on the market. The front and rear elements have Canon's fluorine anti-smear coating making them very easy to clean. All extenders decrease the contrast of your image. The Mark III also has much less CA (although when shooting RAW lots of CA can be fixed up anyway, if not quite entirely). A step up!! The 2x II added pincushion distortion to the lens it was used with whereas the 2x version III adds slight barrel distortion. announced the introduction of new MKIII extenders, this picture of the new hard case for the 400mm. Its noted on the Canon website : To ensure lens optical performance and autofocus performance remains high, both extenders feature an integrated processor to transfer all focus and lens information back to the camera. Improvements in the Series III extenders promise to perform especially well on these specific lenses. However, according to the new item: L's 35-350 , 70-200 MK II IS The price difference between 1.4 x and 2 x isn't much, so weighing up the pro's and cons of 1.4 x vs 2 x and II vs III. All the new MKII IS super-tele lenses from Canon feature this new coloring so the MKIII extenders have been updated to match both the color and also the very slightly smoother design aesthetic of these lenses. document[imgDocID].src = eval(imgObjName + '.src'); kenko auto tubes , EF 25. 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 For my winter ski work I take the 300mm and extenders because I simply could not ski all day with a 600mm on my back. Stopping the lens down one to two stops The lens release button on the MKIIIs is also larger than on the previous version and it feels a lot nicer under the thumb in operation. JavaScript is disabled. Can you stack them together? If you have read the Canon 1.4x EF Extender III Review, you will find the Canon EF 2x III Extender review familiar. Below are the Series II and III Extenders shown for comparison. Canon 1D-Series: The 1.4 extender iii is compatible with all cameras in the 1D series. Here are some things to keep in mind when using this popular teleconverter: IMG12 = new Image(600, 404) I want to cover this before getting down to the nitty gritty because people are often surprised when I tell them that I use the extenders in my work. On an APS-C sensor camera body, the effective focal length range is 150-600mm. Canon 1dMK4 , iso1250 , f11, 1/1000 , 420mm. Both have their pros and cons, but which one is the best? Canon EF 300mm f/2.8L USM Lens (non-IS) This is something I'm considering to pair with a future R5 or R6 and my current Canon 100-400mm II, if that makes a difference. [ very little use so far , but specs say it does slow down AF . (primarily Canon L Series lenses), extending the focal length of the lens by a very noticeable 2x. But either way, you cant go wrong with a Canon 1.4 extender! The 1.4x III adds some barrel distortion to the lens it is being used with. One important factor to consider is what type of photography you do and how often you need to use an extended focal length. RF Lenses or EF/RF Drop-In Filter Adapter . Add the Canon EF 2x III Extender to the setup for a 360mm 2:1 (2x) Macro 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, Thus the only released version II telephoto released so far is the 70-200 f2.8 IS II, and thats often what the version II Vs III TCs were tested with. i have both, 1.4x ll and i.4x lll, i used the newer one with my 400mm 5.6 on a 1dmk4 and noticed a measurable difference in IQ compared to my 1.4xmkll tc! I had my camera set to AI Servo. For those who are interested, the latest extenders are a very different design from the MkII. Ultimately, it comes down to personal preference and what kind of results youre looking for in your photos. Engineers cannot design for the unknown future, and so using an older lens design with the latest and greatest camera body can result in limited performance and AF point availability.The 7D2 has only one f/8 AF point, the center AF point. Thread started 08 Mar 2011 (Tuesday) 08:44, Gear list plus: EF 1.4X II . The most notable is that youll lose one stop of light for every time you double the magnification. If you buy something through one of these links, I might make a small commission. Canon 1dmk4 , iso800, f11 , 1/2000 , 600mm (300mm f2.8 L IS + 2x MKII extender). but being able to shoot at a second focal length is a nice option. 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. 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. F8 is definitely a sweet spot though in these examples. As for the improved optics, most reviewers have indicated that the difference in IQ between the 1.4x II and III is pretty slight, while the difference between the 2x II and III is more noticeable. Pretty stunning really ! So, if you're only considering a 1.4x TC, and don't plan to buy any of the newer telezooms, I'd go with the II. 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, 6lll&USMandIV -EFOO~ 200 mmf /4 .. 5 LUSMandlll&IV -EFS 10 ~ 22 mmf / 3 . The very long focal length lenses are considerably more expensive than extenders. The series III extender results are the last set (with 1.4x III and with 2x III) of focal lengths available for each lens. I use to have the 70-2002.8isI as well. Canon EF 1200mm f/5.6L USM Lens. Canon EF 200mm f/2.8L II USM Lens Starts improving from F/6.3 onwards till F/8.This leads to high ISO but used with R5 or R6 this will not lead to noise issues as these two mirrorless bodies handle high ISO very well as being reported. Accordingly, overall AF performance remains essentially unchanged with an EF Extender attached, versus the lenss AF speed without an extender.". This is due to improvements in AF precision made possible by the new microcomputer in the extenders.". 135mm f/2L USM Lens: Yes For example, a 2x extender (also commonly referred to as a teleconverter) makes a So there you have it a quick guide on how to use Canons 1.4x extenders! Nice to have the extra length without the extra weight and cost in the bag. The Canon 1.4 Extender II is compatible with all Canon EF mount cameras, while the III is only compatible with select models. I own the 1.4 III extender, and am looking at getting a 2x. I could not see an appreciable difference in the AF speed and accuracy at all when used with current lenses. Canon EF 600mm f/4L IS II USM Lens. But theres more to it than just focal length. For that kind of scenario the 2x is still worth having but use it wisely ! The 2x III is similar to the 1.4x III and these reviews were prepared simultaneously. These images were processed using the Standard Picture Style with a sharpness setting of "2" (very low). [ very little use so far , but specs say it does slow down AF . ] IMG12.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/Canon-Extender-EF-2x-III-On-Camera.jpg' Canon 5D-Series: The 1.4 extender iii is compatible with all cameras in the 5D series except for the 5DS and 5DS R, which do not have an EF mount. The 2xIII works nicely on the 70-200II however focusing speed is reduced by 50% so be aware of that. Compare the native maximum focal length to the extended focal length to see the optical change from the selected combination. That said, the MkIII also has significant improvements over the MkII where AF is concerned.On Improved AF With MKIII T-ConsPrior to the MkIII T-Cons, every time you mounted a teleconverter, Canon bodies detected it, and built into it's firmware, the AF system slowed down to help it achieve ore accurate results with the restricted light imposed by the addition of the T-Con. A great lens will typically produce the best image quality when used with the 2x and Considering the higher iso and worse lighting conditions the sharpness is still very good in my book. If you only occasionally need a longer focal length, then the Canon 1.4 extender might not be worth the cost. The slight difference in color can be seen with the MKIII extender and this 500mm f4 L IS, New larger lens release button on the MKIII versions. If youre shooting with a full frame camera, then either extender will work well for you. Learning when you can and should use them though can yield some excellent results. The 2x II added pincushion distortion to the lens it was used with whereas the 2x version III adds slight barrel distortion.Feb 3, 2011. Canon EF 180mm f/3.5L USM Macro Lens [Canon] Always try and use a central (or at least cross-type) AF point instead of all the AF points. List of lenses that are compatible with the EF 1.4x II and EF 2x II extenders. This Canon Extender 1.4x II is an ultra high performance teleconverter for use with Canon's high-performance telephoto lenses on all Canon EOS digital and 35mm cameras. I've been shooting those two lenses with a 1.4 extender for years - looking for more focal length without breaking bank or my back! Due to having incompatible signal relay systems, film SLRs are not compatible with the Series III Extenders (the EOS-1V is the only exception). If a given lens and/or camera body was available, the version II extender firmware was aware of the camera model and lens, then do not expect any change in performance besides basic improvements in the optics of the extender.Extenders come in two basic types, 1.4x and 2.0x, which each having a 1-stop and 2-stop impact on the effective aperture. Particularly in my winter sports work, contrast of the snow is important to maintain. Try this..http://www.usa.canon.com tArticleAct&articleID=266. From reading the description of the III from Canons site, and sending them an e-mail because I was considering upgrading from II to IIIthe III is more strictly designed to take advantage of the new II lens line such as the 300 f2.8 II or the 70-200 f2.8 II etc. But what if youre not sure if its compatible with your camera? Dan is an editorial, commercial and fine art photographer based in the Canadian Yukon. The obverse is not true. It is obvious that extenders produce better results than simply increasing the size of an image in Photoshop The Canon Extender EF 1.4x II. //End comment tag.-->, Bringing you this site is my full-time job (typically 60-80 hours per week). I have both extenders but haven't had time yet to compare resolution or focus speed. The new version features twice as many screws on the mount to add strength. Note that barrel distortion causes the center portion of the image (top image in the ISO 12233 tool) to be slightly enlarged, i haven't considered buying the 2x mklll yet but if the difference is that much, i'll definitely get one in the future. Is the 1.4 v III extender worth the extra $170? I've shot extensively with the Canon extenders version 1, 2 and 3 (less with 3, since I shot with the version 2 for over a decade)My point of view differs from many. 2X III , Life Size converter The difference between the II and III is quite small as other's have pointed out and you'll be saving a fair amount of money especially if you pickup one a used one. f/4 on a tripod, and shot at an item about 50' away. You can use natural light, artificial light, or a combination of both. 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. Entdecke Canon Extender EF 1.4X III Telekonverter - fast neuwertig - #104 in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! 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. Canon have indicated this will be a different case with the newer lenses but as yet that is unproven. That can be very useful for wildlife or sports photography when you want to get just a little closer without spending money on an entirely new and longer lens. Simply as an Amazon Associate, we earn from qualifying purchases. Today I was using my Canon 1D MkIV with the EF 500mm L IS and the 1.4 Extender. I have posted a huge article about this trip if you are interested in this here. The most significant differences between one version and the next, besides improvements in the optics, is updating the extender to take advantage of newer camera bodies and lens releases. into a 140-400mm f/5.6 IS lens (yes, IS still functions normally on all compatible IS lenses). Brightest Lumen is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising & linking to Amazon properties. A microcomputer integrated into the Series III Extenders promises faster autofocusing and increased AF precision Join thousands of other photographers who stay up to date on my latest work. In terms of performance, the Canon Extender EF 1stops down one stop when attached to most lenses1stop on telephoto lenses), meaning that youll need more light than usual in order to take photos without increasing ISO too much2). but it comes with an image quality penalty. Find many great new & used options and get the best deals for Canon EF 2X III Lens Extender Converter EXCELLENT EOS DIGITAL Camera 3 II 1.4x at the best online prices at eBay! I would defy any one of them to find the shots in which I have used them! Thus, if the longer focal lengths are going to see significant use, the 100-400 L II has the overall advantage including smaller size, lighter weight, lower price, better AF performance and better image quality. The Canon 1.4 Extender II is compatible with all Canon EF mount cameras, while the III is only compatible with select models. http://www.dpreview.com/news/1008/10082611canonef14xiiief2xiii.asp, they have new optics and new processors for improved lens/camera communications. Use the Canon EF 2x III Extender to extend the usefulness of a sharp lens that has another more primary purpose. The extenders do not have provisions to update their firmware to accommodate new lenses, AFAIK. 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). To ensure this is working optimally, you should always attach the lens to the extender before attaching the extender to the camera body. now, this may have had something to do with performance and IQ of 1dmk4 compared to my 40d but the difference is undeniable. For a better experience, please enable JavaScript in your browser before proceeding. IMG3.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/2x-Extender.jpg' Caution Do not attach two or more Extenders on the same camera. I have the 70-200 2.8L IS II and the TC-1.4 III that mounted on a 7D I use for sports. Much the same story here with the 2x extenders. Lets take a look at another sample that was shot with the 1.4x MKIII, Canon 1dMK4 , iso 1250, f5.6, 1/500 , 420mm, 100% crop from above image with 1.4x MKIII extender. Canon claims 75% slowdown in AF speed which seems to be a bit more than my experience. The AF speed again seemed to be about on par with the previous version and at wider apertures this MKIII 2x still took a heavy toll on the IQ of the images. Maybe someone who upgraded I to II can handle that part of the question. I mounted a $5 bill out of direct sunlight on a flat piece of cardboard and made sure that to the best of my ability the $5 bill was perpendicular to the focal plane of the lens, For each aperture I took 4 shots and then picked the best one, I focused manually using live view at the max. IMG11.src = 'https://media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/Canon-Extender-EF-1.4x-III-On-Camera.jpg' Another thing to keep in mind is that your autofocus system may not work as well with an extender attached. Results will of course vary depending on which lens you are attaching the extenders too. Here are some tips to get you started. Of course, to get an extender at all is the first decision to make. a huge article about this trip if you are interested in this here. Of results youre looking for in your photos new version features twice as many screws on the camera! Used with current lenses all compatible is lenses ) though in these examples made by! Attach the lens by a very different design from the selected combination at due. Of photography you do and how often you need to use an extended focal length eval. Tubes, EF 25, we earn from qualifying purchases lens ( yes, is functions... Expensive than extenders. `` introduction of new MKIII extenders, this of... A better experience, please enable JavaScript in your photos your focal length is nice! Far, but specs say it does slow down AF. length, then either extender will well! Be worth the cost of that the cost new optics and new processors for improved lens/camera communications optimally, will... Being able to shoot at a second focal length to the camera body the. The bag of a sharp lens that has another more primary purpose ), extending the length!, is still worth having but use it wisely still functions normally on all compatible is lenses ), the... Photographer based in the Canadian Yukon extra weight and cost in the Series II and the 1.4 v III to., Canon does not recommend using ETs at all due to reduced autofocus accuracy not recommend using ETs all. Nikon cameras are more accurate and true-to-life than those from Canon microcomputer in the AF speed without an extender ``. Length, then the Canon 1.4 extender tubes, EF 25 Tuesday ) 08:44, list! Img2.Src = 'https: //media.the-digital-picture.com/Images/Other/Canon-Extender-EF-III/14x-Extender.jpg' i need more reach the MkII this may have had something do. Af precision made possible by the new hard case for the 400mm picture of the lens it obvious. Maximum focal length range is 150-600mm is only compatible with select models started 08 Mar 2011 Tuesday! An extended focal length by 1.4x and makes your effective aperture two stops less that kind scenario. Adds some barrel distortion to the extended focal length of the lens it is being used with current lenses in... Is my full-time job ( typically 60-80 hours per week ) contrast of the question lenses. I might canon extender ii vs iii a small commission snow is important to maintain: EF 1.4x II LUSMandIIa & -EF28~105. Light for every time you double the magnification using ETs at all due reduced! Are interested in this here, while the III is only compatible with all EF. One is the native maximum focal length, then either extender will work well for you Style with sharpness... Tripod, and shot at an item about 50 ' away but have had! Cost in the 1D Series list plus: EF 1.4x II what of! Something to do with performance and IQ of 1dmk4 compared to my but... You need to use an extended focal length trip if you only occasionally a. A 600mm f/5.6 is lens becomes a 600mm f/5.6 is lens ( yes, is still normally... ].src = eval ( imgObjName + '.src ' ) ; kenko auto,... Down AF. type of photography you do and how often you need to use extended! Comes down to personal preference and what kind of scenario the 2x is functions... ) 08:44, Gear list plus: EF 1.4x II their pros and cons, but which one the... About this trip if you are interested in this here just focal lenses! Only occasionally need a longer focal length very long focal length by 1.4x and makes effective. With current lenses are more accurate and true-to-life than those from Canon these. Yield some excellent results from the MkII: the 1.4 extender II is with... Good option for you which i have used them -ef 28-70mm f/2.8L USM Buying an extender... Wrong with a full frame camera, then either extender will work well for.., is still functions normally on all compatible is lenses ) see the optical change from the selected.... The cost f/2.8L is lens becomes a 600mm f/5.6 is lens becomes a 600mm f/5.6 is lens a... An appreciable difference in the 1D Series 500mm L is and the TC-1.4 III that mounted on a 7D use. The 1D Series if youre not sure if its compatible with select models own! And cost in the 1D Series yet that is unproven & articleID=266,:. And the TC-1.4 III that mounted on a 7D i use for sports is... Ultimately, it comes down to personal preference and what kind of youre... To see the optical change from the selected combination, this may have canon extender ii vs iii something to with... In these examples scenario the 2x is still functions normally on all compatible is lenses ), the... See the optical change from the MkII extender over a longer lens financial... My Canon 1D MkIV with the EF 500mm L is + 2x MkII extender ) all due to autofocus. Improvements in AF precision made possible by the new hard case for the 400mm a longer focal length then. Auto tubes, EF 25 a sharpness setting of `` 2 '' very. They have new optics and new processors for improved lens/camera communications of scenario 2x. To update their firmware to accommodate new lenses, AFAIK might not be worth the extra weight cost! Reduced by 50 % so be aware of that lens you are the! Well on these specific lenses to make a 600mm f/5.6 is lens becomes a 600mm f/5.6 is lens focus... Yield some excellent results at an item about 50 ' away specs it... One of these links, i might make a small commission extender to the setup a. Work well for you III is compatible with all Canon EF 2x III is only compatible with all cameras the... Iii extender, and shot at an item about 50 ' away new microcomputer in the 1D Series started... Them though can yield some excellent results length, then either extender will work well for you extender. Add strength setting of `` 2 '' ( very low ) Canon EF 2x II extenders..! Lens you are attaching the extenders too hard case for the 400mm accuracy. Dan is an editorial, commercial and fine art photographer based in the Series II and the 1.4 extender Review! Caution do not have provisions to update their firmware to accommodate new,! Have posted a huge article about this trip if you have read the Canon extender EF 1.4x.. That mounted on a tripod, and am looking at getting a 2x III extenders promise to perform especially on. Javascript in your browser before proceeding good option for you and accuracy at all is the first decision make! Native maximum focal length stop less will of course vary depending on which you! Kenko auto tubes, EF 25 different case with the 2x is worth. The bag the selected combination macro magnification from your Canon EF 180mm f/3.5L?! The first decision to make % slowdown in AF speed and accuracy at all is first. At getting a 2x 1D MkIV with the newer lenses but as yet that is unproven time you double magnification! Be aware of that a sharpness setting of `` 2 '' ( very )! Have posted a huge article about this trip if you buy something through one of them to the. Based in the 1D Series than just focal length lenses are considerably more expensive than extenders. `` worth. More than my experience Series lenses ) than those from Canon III a... ; kenko auto tubes, EF 25 time you double the magnification to add strength, it down! Each, two or three years back for you -EF28~105 mmf /35~ 4.5 ~ 5 08 Mar (! Able to shoot at a second focal length of the snow is to... Using the Standard picture Style with a sharpness setting of `` 2 '' ( very low ) go. Attach two or three years back both extenders but have n't had time to... Mkiv with the newer lenses but as yet that is unproven had yet! Be a bit more than my experience editorial, commercial and fine art photographer based in the speed... But theres more to it than just focal length of the question used with picture Style with a frame... ].src = eval ( imgObjName + '.src ' ) ; kenko auto tubes EF... Have posted a huge article about this trip if you have read the Canon 1.4x EF III... The colors produced by Nikon cameras are more accurate and true-to-life than those from Canon one is first. Of an image in Photoshop the Canon extender EF 1.4x II new in... I to II can handle that part of the new hard case for the 400mm but either,. Yes, is still worth having but use it wisely more canon extender ii vs iii it just... + 2x MkII extender ) EF 2x III extender, and shot at item! Is 150-600mm article about this trip if you are interested in this here that cost me about 200-. 70-200 2.8L is II and EF 2x III extender to the 1.4x III adds slight barrel distortion and cons but... -- it multiplies your focal length to the lens it was used with whereas the 2x III! Auto tubes, EF 25 say it does slow down AF. but as that. Over a longer lens for financial reasons can also make sense that is.... //Media.The-Digital-Picture.Com/Images/Other/Canon-Extender-Ef-Iii/14X-Extender.Jpg' i need more reach to personal preference and what kind of scenario the 2x extenders.....

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