Canon 7D Mark II w/Canon BG-E16 Battery Grip; Canon EOS 50D w/Canon Battery Grip; Canon SL1; Tokina 12mm - 24mm f/4 PRO DX II; Canon EF 24-105mm f/4 L IS; Canon EF 70-200mm f/2.8 L IS; Canon 70-300mm f/4-5.6 L IS; Sigma 85mm f/1.4 EX DG HSM; Canon EF 300mm f/4 L IS; Canon EF-S 18-135mm f/3.5-5.6 IS STM; Canon Extender EF 1.4x II; Canon Extender
A lesson one might take from your post is that the EOS R5 makes whatever lens one already owns look better and it is likely not necessary to buy a new lens. I admire your work. I use "EF100-400mm f/4.5-5.6L IS II USM +1.4x III" and also the 2x III for a long focal length with the EOS R5. So far, the only non-Canon lens that I use with the EOS
EOSM + EF 1.4x III Extender + EF 100-400mm f/4.5-5.6L IS II USM lens. Adding a recent Canon EF 100-400mm f/4.5-5.6L IS II USM lens to the EOSM produced a superior experience. I had bought the extender to use with the EOS 6D but I was curious to see how it worked with an adapter on the EOSM so I could take advantage of the added increase in
Canon Extender EF 2x III + Canon EF 200mm f/2L IS USM Lens. Metabones (FW 0.47): Slow but accurate PDAF AF-C and AF-S with Wide, Center and Flexible Spot Fotodiox: Not Tested Viltrox: Not Tested. Canon Extender EF 2x III + Canon EF 300mm f/2.8L IS II USM. Metabones (FW 0.47): Painfully SLOW AF is possible but not recommended This Canon Extender 2x II is an ultra high performance teleconverter for use with Canon's high-performance telephoto lenses on all Canon EOS digital and 35mm cameras. It multiplies your focal length by 2x and makes your effective aperture two stops less. It makes your 70-200/2.8 into a 140-400mm f/5.6, or your 300mm f/2.8 into a 600mm f/5.6.
I recently picked up a used Canon 1.4x III extender. Works as expected on my 90D and my R5 (adapted) with supported Canon lenses. When I attach my Tamron 100-400 to either camera with the 1.4 extender in place the camera reports a Tamron 100-400 but says that a 2x extender is attached!
DJtFFE.
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    • canon extender ef 2x iii compatible lenses sigma