Canon's flagship ultra-wide prime — the RF 20mm f/1.4L VCM with rear filter holder for astrophotography.
The Canon RF 20mm f/1.4L VCM is a revolutionary ultra-wide prime featuring a rear filter holder designed specifically for astrophotography filters. The L designation indicates Canon's highest optical tier. The VCM (Voice Coil Motor) provides fast, precise AF. At 20mm f/1.4, it is one of the fastest ultra-wide primes Canon has ever produced.
Optical performance is outstanding — L-series quality with fluorite and UD elements. Sharpness is excellent from f/1.4. Coma is extremely well-controlled for astrophotography — the primary design focus. The rear filter slot accepts drop-in gelatine filters including light pollution and narrowband astrophotography filters. A lens designed from the ground up for night sky photography.
Canon RF mount, full-frame. Rear filter slot for drop-in filters — the front element is bulbous with no front filter thread. Weight is approximately 495 grams — impressively compact for the specification. Build quality is outstanding L-series with full weather sealing and fluorine coatings. VCM motor is fast, precise, and silent.
Very limited used availability as a current flagship lens. Check AF, rear filter mechanism, and clean elements. A revolutionary lens — the built-in rear filter slot for astrophotography filters was the headline feature that no competitor offers. One of the finest ultra-wide primes available. The Sigma 20mm f/1.4 Art is the main competitor without the rear filter slot.