Key Features. Extend the reach of Canon EF-mount telephoto lenses with this C-AF 2x Teleplus Teleconverter from Viltrox. This 2x teleconverter effectively doubles the focal length of the attached lens while retaining autofocus and communication between the camera and the lens. The teleconverter uses a seven elements, four groups optical design wrote: Shadowsports. The manual says it WON'T autofocus. Have I missed that? Where does it say it won't autofocus. Ah, In the lens manual, not the extenders manual. This is misleading. The extender manual does not say MF only. The lens manual does. Sorry I missed your point. AF_MicroAd
SITC2001C • MFR # 870101. 37 reviews. Canon EF Teleconverter. 2x Magnification Factor. Communication between Lens & Camera. AF Operates at up to f/8. Optimized for Canon EF-mount lenses in the Global Vision line, the TC-2001 2x Teleconverter will offer an increase in focal length of 2 times for select Global Vision lenses. This model offers
Compatible lens chart (Last Update Date：Decembar 14 2023) Please make selections below. Di III Lenses. 20mm F/2.8 Di III OSD M1:2 (Model F050) Product Page.
The Canon Extender EF 2x III is a compact extender that increases the focal length of Canon L-series telephoto lenses by a factor of 2x. Its high AF accuracy makes it ideal for press, sports and nature photography. It is also highly resistant to dust and water, and features anti-reflection materials and lens coatings that minimise ghosting and

My subject, the Moon, utilizing a Canon 5Dsr, Canon EF 100-400 f4.5-5.6L IS II USM, EF 2x III & a 1/6 Crop Factor, producing a theoretical 1280 mm. Yes, it reduced the f-stop to f11, exactly what I wanted, yes, I lost auto focus, intended manual focus anyway by utilizing built in digital zoom and manually focusing and backing out.

Canon lists the lenses compatible with their 1.4x and 2x extenders and you'd ultimately need to make sure your lens is on the list. The Canon EF 100-400mm f/4.5-5.6L IS USM is going to approximately provide the range that you'd get from a 70-300mm with a 1.4x extender, but that's few hundred more than your current 70-300mm DO lens. FFAT3.
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    • canon ef 2x iii extender lens compatibility