Story timeline

Canon RF 600mm f/4L IS USM

2 stories tracked since 8 Aug 2026 — latest 12 Nov 2026. This page updates itself as new coverage lands.

  1. 8 Aug 2026 · Lens Rumour

    Canon Reportedly Developing a Telephoto Zoom to Rival the 600mm f/4L

    Canon is reportedly working on a telephoto zoom that would overlap with the RF 600mm f/4L IS USM prime, per The Phoblographer. No specs, focal range, or release timeline confirmed.

  2. 12 Nov 2026 · Lens Rumour

    Canon Supertelephoto Prime with Built-In Teleconverter Confirmed

    Canon is working on a supertelephoto prime with a built-in teleconverter, per Canon Rumors, with an unconfirmed spec of RF 400mm f/2.8L IS with a 1.5x converter built in. That would give 600mm at f/4.2 in the same barrel. Canon Rumors says the design will differ from current built-in teleconverter implementations, without specifying how. RF-native versions of the 400mm f/2.8L and 600mm f/4L have been delayed, with parts shortages cited.