My readers know me as The Wildlife Ho-tographer. I have been using Canon gear for over 30 years. You can follow my travels on Facebook, Twitter and Instagram, see my equipment bag and works on MichaelDanielHo.com
Throughout the decades, I have owned and/or used all the EOS camera lines. I bought my first EOS 1 back in 1989 as my main camera and have upgraded to every model since. Now the EOS-1D X Mark III is my primary body and the EOS-1D X Mark II and EOS-1D Mark IV are my backup cameras.
As you know, I am not enamored with the current mirrorless cameras on the market. However, I may make an exception when the top-of-the-line Canon EOS R1 mirrorless camera debuts next year. So far, Canon has not produced any Super Telephoto lens in the RF mount. However, in 2021 there will be two new lenses available with the R1.
My guess is, it will be the RF 400mm f/2.8L IS and RF 500mm f/4L IS. Both lenses will come with a hefty weight reduction by perhaps one pound or more. As much as I am excited to try out the EOS R1, I will not be buying any RF lenses. My complement of EF lenses have served me well and I do not need another series of lenses to clutter my equipment bags.
Stay tune as I get the latest leaks and information on the upcoming EOS R1 and Super Telephoto lenses. If the Japanese government is serious about hosting the Summer Olympics on July 23, 2021, Canon is likely to have a development announcement in early 2021 and possible limited delivery in time for the Olympics.