Lens compatibility from EOS 1300D to EOS R7 in EF & RF Lenses 11-14-2023; Mount Adapter EF-EOS R question about compatibility with Extender EF 1.4x III in Camera Accessories 11-14-2023; Interesting EF 400 f2.8 IS II issue - EOS-1D X Mark III rendered unresponsive in EF & RF Lenses 11-12-2023; EF 100-400mm f/4.5-5.6L IS II USM Lens switches to
The Canon RF 2x extender is very small and light, increasing the overall lens length by only 1.55" (39.3mm) and total weight by only 12 oz (340g). Load Comparison Images. The mounted extender shifts the lens weight forward modestly for a slight change of balance. Zoom and focus rings also shift away from the camera body a modest distance.
The lens you describe, the EF 75-300mm f/4-5.6 III which often comes in a kit with the EOS Rebel T7, is not compatible with either EF extender. The EF Extenders can only work with the lenses which have clearance in the back to allow space for the extender's protruding element to sit inside.
EXTENDER EF1.4X III / EF2X III Instruction Manual. The file is a manual (PDF file) for EXTENDER EF1.4X III / EF2X III. Download drivers, software, firmware and manuals for your Canon product and get access to online technical support resources and troubleshooting. As it stands, the Extender 2× on an f/4 lens will indeed lose PDAF with the 6D. As far as image quality is concerned, I did some tests a while ago which showed that with the 70~200/4L IS at maximum extension, the lens +1.4× revealed more detail than the lens alone, but the lens+2× did not reveal any more detail than the lens+1.4×. This was
Will this extender match with my EF 400mm 1:5.6 L telephoto lens? Will AF work? I thought the 400 mm was pretty high end expensive when I bought it, but compared to the super telephotos available now I guess it was peanuts. Maybe I need to upgrade the 400mm?
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    • canon ef 2x iii extender lens compatibility