FitMyLensthe lens-by-mount reference

Best astrophotography lenses for the Canon EOS R6 Mark II

5 astrophotography lenses that fit the Canon EOS R6 Mark II (Canon RF mount) — wide and bright for stars and night sky. Sorted brightest-aperture first; every spec from the manufacturer's catalog.

Start with the Canon RF 14mm f/1.4 L VCM. At f/1.4 it is the brightest of the 5 astrophotography Canon RF lenses that fit the Canon EOS R6 Mark II — the full comparison is below.

Last verified 2026-06-21 · Canon RF mount · Canon full-frame body

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Affiliate links never affect our specs or which lenses we compare.

Check the Canon RF 14mm f/1.4 L VCM price on Amazon →

📦 Buying before a trip or a shoot? Amazon Prime's free 30-day trial includes free fast delivery, so the lens arrives in days rather than weeks. Start the free 30-day trial →

Affiliate link — we may earn a commission on qualifying sign-ups, at no extra cost to you. Current terms are on Amazon's page.

FocalLensBuyMax apertureTypeCoverageBest for
14mmCanon RF 14mm f/1.4 L VCMAmazon →f/1.4primeFull-frameWide-angleAstrophotographyLandscapeLow-light
20mmCanon RF 20mm f/1.4 L VCMAmazon →f/1.4primeFull-frameWide-angleAstrophotographyStreetLow-light
24mmCanon RF 24mm f/1.4 L VCMAmazon →f/1.4primeFull-frameWide-angleAstrophotographyStreetLow-light
24mmCanon RF 24mm f/1.8 Macro IS STMAmazon →f/1.8primeFull-frameWide-angleAstrophotographyStreetMacro
10-20mmCanon RF 10-20mm f/4 L IS STMAmazon →f/4zoomFull-frameWide-angleLandscapeAstrophotography

Weight & weather sealing on the Canon EOS R6 Mark II

On long approaches the decision is often made by weight, not aperture. Manufacturer-published weights for 4 of the 5 lenses above (the other 1 has no verified weight in our dataset yet — omitted, never estimated):

LensWeightWeather sealing
Canon RF 24mm f/1.8 Macro IS STM270gNone claimed
Canon RF 24mm f/1.4 L VCM515gWeather-sealed
Canon RF 10-20mm f/4 L IS STM570gWeather-sealed
Canon RF 14mm f/1.4 L VCM578gWeather-sealed

Packing light? The lightest here is the Canon RF 24mm f/1.8 Macro IS STM at 270g. The lightest weather-sealed option is the Canon RF 24mm f/1.4 L VCM at 515g.

Weights and sealing from each manufacturer's published spec sheet (per-lens sources recorded in the dataset) · methodology

FAQ

What is the best astrophotography lens for the Canon EOS R6 Mark II?
Canon RF 14mm f/1.4 L VCM (14mm f/1.4) is the standout astrophotography option that fits the Canon EOS R6 Mark II. 5 astrophotography Canon RF lenses fit in total — compare them below.

Do these astrophotography lenses fit the Canon EOS R6 Mark II?
Yes — every lens here is a Canon RF mount lens, so it fits the Canon EOS R6 Mark II and covers its full-frame sensor.

What is the lightest astrophotography lens for the Canon EOS R6 Mark II?
The Canon RF 24mm f/1.8 Macro IS STM at 270g (manufacturer-published weight). The lightest weather-sealed option is the Canon RF 24mm f/1.4 L VCM at 515g. Weights for 4 of the 5 lenses on this page are in the weight table above.

All lenses for the Canon EOS R6 Mark II · the same use across mounts: Astrophotography lenses for Canon RF · all cameras