My regular shoulder bag kit is the 70D, the 70-200 2.8, a 40mm f/2.8, the 1.4x III teleconverter, an EF 25 II extension tube, and a 430 EX II flash. Gives me pretty good coverage out to 448mm (compared to a full frame camera). Canon EF 100-400mm F4.5-5.6L IS II Canon EOS 7D Mark II Canon EOS R Canon Extender EF 1.4x II Canon Extender EF 1.4x III If you believe there are incorrect tags, please send us this post using our feedback form . Introducing Canon's second generation of IS super-telephoto lenses: [B]EF 300mm f/2.8L IS II USM, EF 400mm f/2.8L IS II USM, EF 500mm f/4L IS II USM and EF 600mm f/4L IS II USM. Each Series III Extender features a newly developed microcomputer that increases AF precision when the extenders are used with an IS II super-telephoto lens. AF Buy it New. 5% OFF † Every Day with Adorama Edge Credit Card. Canon Extender EF 2x III Tele Extender, USA. 4.5 (268) $429.00. Canon Extender EF 1.4x III Tele Extender, USA. 4.5 (268) $429.00. Canon Extender EF 1.4x III Tele Extender, USA With Free Accessory Bundle. 1-770-333-4200. Description. The Canon 1.4X EF Extender is a professional grade teleconverter designed exclusively for use with select Canon brand L-Series lenses (focal lengths over 135mm). Increasing the lens focal length by a factor of 1.4 times, Extender EF 1.4X incorporates incorporates careful lens placement and anti-reflective coatings a larger extension tube ( EF 25). My Question is should i keep the Ef 12 tube or return it and pay the 40$ more for the EF 25? I have Rebel Xt with 28-135mm Canon IS, 100mm Canon Macro, 100-400mm . Canon L Is lens. I asked a question the other day about adding a canon 1.4x extender to my 100-400 lenses and the The Canon 2x lens extender doubles the focal length of a lens, making (for example) a 200mm lens function as a 400mm lens. Canon 2X Extender EF II ~$320 Canon 2x Extender EF III User Reviews. 9.5k. Posted February 26, 2004. When I first got my 300/2.8L-IS I had the 2X-I and then when I got the 70-200/2.8L-IS lens I tried a 2X-II belonging to a friend. Sold my 2X-I the next day and bought the Mk-II. It's that visibly sharper and better contrast. In fact I bought two of them and have used them along with the 1.4X-I all three stacked. I have also owned a 400mm f2.8 is, but the 300mm works better with the 2x. In fact I preferred the 300mm + 2x @ 600mmf5.6 vs 400mm+1,4TC@560mmf4. I did a lot of comparisons between them before I sold the 400mm. And the 300mm with TC's works very well with a monopod. To bring out all the details this lens combo can resolve, you need to shoot raw. Extender EF 2x III (預計送貨需時1個月) $3,180.00 $3,580.00. EF 2x III能將主鏡頭 # 焦距提升2倍，為專業攝影師提供靈活的焦距伸延能力，其5組9片的光學設計配合新一代大光圈遠攝及超遠攝L鏡頭 † ，能大幅度減少焦距提升後常見的色差及顏色模糊現象。. 增距鏡配備了 txQeg.