According to Canon Rumors via Digicame-Info, the Canon RF 100-300mm f/2.8L IS USM will be announced very soon. The new lens won't be cheap, as the rumored price is $9,499 USD.
According to Canon Rumors, this lens, the first of its kind from Canon, will be extremely light weight for what it is. Canon usually announces things near the beginning of the week, so expect to see this lens announced later today or tomorrow.
