Astrophotography lenses for Canon RF mount

6 astrophotography options that fit Canon EOS R series (full-frame R5/R6/R8) and APS-C (R7/R10/R50) — wide and bright for stars and night sky. Every spec from the manufacturer's own product name and catalog.

Last verified 2026-09-01

Shooting a specific body? Per-camera fits: Canon EOS R · Canon EOS R1 · Canon EOS R10 · Canon EOS R100 · Canon EOS R3 · Canon EOS R5 · Canon EOS R5 Mark II · Canon EOS R50 · Canon EOS R6 · Canon EOS R6 Mark II · Canon EOS R7 · Canon EOS R8 · Canon EOS RP · Canon EOS R6 Mark III · Canon EOS R50 V · Canon EOS R6 V.

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Focal	Lens	Buy	Max aperture	Weight	Filter	Type	Coverage	Best for
10-20mm	Canon RF 10-20mm f/4 L IS STM	Check price →	f/4	570 g	—	zoom	Full-frame	Wide-angleLandscapeAstrophotography
11-20mm	Tamron 11-20mm f/2.8 Di III-A RXD	Check price →	f/2.8	340 g	67mm	zoom	APS-C	Wide-angleLandscapeAstrophotography
14mm	Canon RF 14mm f/1.4 L VCM	Check price →	f/1.4	578 g	—	prime	Full-frame	Wide-angleAstrophotographyLandscapeLow-light
20mm	Canon RF 20mm f/1.4 L VCM	Check price →	f/1.4	519 g	67mm	prime	Full-frame	Wide-angleAstrophotographyStreetLow-light
24mm	Canon RF 24mm f/1.4 L VCM	Check price →	f/1.4	515 g	67mm	prime	Full-frame	Wide-angleAstrophotographyStreetLow-light
24mm	Canon RF 24mm f/1.8 Macro IS STM	Check price →	f/1.8	270 g	52mm	prime	Full-frame	Wide-angleAstrophotographyStreetMacro

Weight & weather sealing: which of these can you carry all day?

On long approaches the decision is often made by weight, not aperture. Published weights for 6 of the 6 lenses above:

Lens	Weight	Weather sealing
Canon RF 24mm f/1.8 Macro IS STM	270g	None claimed
Tamron 11-20mm f/2.8 Di III-A RXD	340g	Weather-sealed
Canon RF 24mm f/1.4 L VCM	515g	Weather-sealed
Canon RF 20mm f/1.4 L VCM	519g	Not verified (weight from the Canon RF lens-mount list table; sealing not stated on the source page)
Canon RF 10-20mm f/4 L IS STM	570g	Weather-sealed
Canon RF 14mm f/1.4 L VCM	578g	Weather-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 Tamron 11-20mm f/2.8 Di III-A RXD at 340g.

Weights and sealing as published for each lens — 5 from the manufacturer's own spec page, 1 from a published lens database or review quoting the maker's figure (per-lens source recorded in the dataset) · methodology

All Canon RF lenses: the full Canon RF index · other mounts: Sony E · Nikon Z · Fujifilm X · L-Mount · Micro Four Thirds.