FitMyLensthe lens-by-mount reference

Best astrophotography lenses for the Canon EOS R5

5 astrophotography lenses that fit the Canon EOS R5 (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 R5 — the full comparison is below.

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

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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 R5

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 R5?
Canon RF 14mm f/1.4 L VCM (14mm f/1.4) is the standout astrophotography option that fits the Canon EOS R5. 5 astrophotography Canon RF lenses fit in total — compare them below.

Do these astrophotography lenses fit the Canon EOS R5?
Yes — every lens here is a Canon RF mount lens, so it fits the Canon EOS R5 and covers its full-frame sensor.

What is the lightest astrophotography lens for the Canon EOS R5?
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 R5 · the same use across mounts: Astrophotography lenses for Canon RF · all cameras