Specifically, Canon suggests that AF drive speed is reduced by 50% when using the 1.4x Extender. Macro The 1.4x III Extender has some useful implications in macro work, offering an extra 40%
With the 14-35 they introduced in the L-line, a lens that does not even cover the whole image circle and relies on image stretching and cropping to fix the major distortion. Mr F48's gear list: Canon EOS R6 Sigma 50mm F1.4 DG HSM | A Canon RF 24-70mm F2.8L IS USM Canon RF 70-200mm F2.8L IS USM Canon RF 16mm F2.8 STM. 300/2.8 + 2x gives 600/5.6 and you still have AF. The 300/2.8 is good with teleconverters, but only you can answer whether the $4000 cost is "worth it." The most economical alternatives for greater reach but still maintain AF are the Sigma 50-500 f/4-6.3 EX DG HSM and the Tamron 200-500 f/5-6.3 Di LD. :For Mirrorless Cameras Fixed Focal/Macro ＜Di III series＞ 150-500mm F/5-6.7 Di III VC VXD (Model A057) Product Page. Di III Lenses. CANON EF EXT. 2 X III TELECONVERTER. 3.695 kr. Fri fragt, 1-4 dage. Annonce. CANON EXTENDER EF 2x III. 3.699 kr. Ikke på lager. 4.5. Extender EF 2x III. eKHACdH.