Best low-light lenses for the Canon EOS R50 V
17 low-light lenses that fit the Canon EOS R50 V (Canon RF mount) — fast apertures (f/1.8 and brighter) for dim conditions. Sorted brightest-aperture first; every spec from the manufacturer's catalog.
Start with the Canon RF 45mm f/1.2 STM. At f/1.2 it is the brightest of the 17 low-light Canon RF lenses that fit the Canon EOS R50 V — the full comparison is below.
It is a full-frame lens. It fits and shoots at full resolution, and the glass often carries over if you move to a full-frame body later — but for the same framing it is larger, heavier and dearer than a lens built for this sensor. The brightest APS-C option here is Sigma 16mm f/1.4 DC DN Contemporary at f/1.4.
One limit of this table: it lists only Canon RF lenses that mount natively on the Canon EOS R50 V — lenses fitted through an adapter are not included here. See which mounts adapt to which.
What these focal lengths actually give you on the Canon EOS R50 V
The Canon EOS R50 V has an APS-C sensor, so it sees a 1.6× crop of what each lens projects (Canon's APS-C is 1.6×, not the 1.5× used by Sony, Nikon and Fujifilm). Every focal length below therefore frames 1.6× tighter than its marked number. A 50mm on the Canon EOS R50 V frames like 80mm, not the "normal" view its marked number implies.
| Lens | Marked | Frames like, on the Canon EOS R50 V |
|---|---|---|
| Canon RF 45mm f/1.2 STM | 45mm | 72mm |
| Canon RF 50mm f/1.2 L USM | 50mm | 80mm |
| Canon RF 85mm f/1.2 L USM | 85mm | 136mm |
| Canon RF 14mm f/1.4 L VCM | 14mm | 22mm |
| Sigma 16mm f/1.4 DC DN Contemporary | 16mm | 26mm |
| Canon RF 20mm f/1.4 L VCM | 20mm | 32mm |
| Sigma 23mm f/1.4 DC DN Contemporary | 23mm | 37mm |
| Canon RF 24mm f/1.4 L VCM | 24mm | 38mm |
| Sigma 30mm f/1.4 DC DN Contemporary | 30mm | 48mm |
| Canon RF 35mm f/1.4 L VCM | 35mm | 56mm |
| Canon RF 50mm f/1.4 L VCM | 50mm | 80mm |
| Sigma 56mm f/1.4 DC DN Contemporary | 56mm | 90mm |
| Canon RF 85mm f/1.4 L VCM | 85mm | 136mm |
| Sigma 17-40mm f/1.8 DC Art | 17-40mm | 27–64mm |
| Canon RF 50mm f/1.8 STM | 50mm | 80mm |
| Canon RF 135mm f/1.8 L IS USM | 135mm | 216mm |
| Canon RF 28-70mm f/2 L USM | 28-70mm | 45–112mm |
Weight & weather sealing on the Canon EOS R50 V
On long approaches the decision is often made by weight, not aperture. Published weights for 17 of the 17 lenses above:
| Lens | Weight | Weather sealing |
|---|---|---|
| Canon RF 50mm f/1.8 STM | 160g | None claimed |
| Sigma 56mm f/1.4 DC DN Contemporary | 280g | Mount gasket only |
| Sigma 30mm f/1.4 DC DN Contemporary | 285g | Mount gasket only (Sigma publishes 285g for the RF mount (265g E / 275g X) — RF figure used) |
| Sigma 23mm f/1.4 DC DN Contemporary | 345g | Mount gasket only |
| Canon RF 45mm f/1.2 STM | 346g | Not verified |
| Sigma 16mm f/1.4 DC DN Contemporary | 415g | Mount gasket only |
| Canon RF 24mm f/1.4 L VCM | 515g | Weather-sealed |
| Canon RF 20mm f/1.4 L VCM | 519g | Not verified |
| Canon RF 35mm f/1.4 L VCM | 555g | Weather-sealed |
| Sigma 17-40mm f/1.8 DC Art | 560g | Weather-sealed |
| Canon RF 14mm f/1.4 L VCM | 578g | Weather-sealed |
| Canon RF 50mm f/1.4 L VCM | 580g | Weather-sealed |
| Canon RF 85mm f/1.4 L VCM | 636g | Weather-sealed |
| Canon RF 135mm f/1.8 L IS USM | 935g | Weather-sealed |
| Canon RF 50mm f/1.2 L USM | 950g | Weather-sealed |
| Canon RF 85mm f/1.2 L USM | 1195g | Weather-sealed |
| Canon RF 28-70mm f/2 L USM | 1430g | Weather-sealed |
Packing light? The lightest here is the Canon RF 50mm f/1.8 STM at 160g. The lightest weather-sealed option is the Canon RF 24mm f/1.4 L VCM at 515g.
FAQ
What is the best low-light lens for the Canon EOS R50 V?
Canon RF 45mm f/1.2 STM (45mm f/1.2) is the standout low-light option that fits the Canon EOS R50 V. 17 low-light Canon RF lenses fit in total — compare them below.
Do these low-light lenses fit the Canon EOS R50 V?
Yes — every lens here is a Canon RF mount lens, so it fits the Canon EOS R50 V and covers its APS-C sensor.
What is the lightest low-light lens for the Canon EOS R50 V?
The Canon RF 50mm f/1.8 STM at 160g (manufacturer-published weight). The lightest weather-sealed option is the Canon RF 24mm f/1.4 L VCM at 515g. Weights for 17 of the 17 lenses on this page are in the weight table above.
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Other uses on the Canon EOS R50 V: Wide-angle (16) Vlogging (6) Travel (17) Landscape (9) Astrophotography (6) Pro standard zoom (7) Budget (10) Street (9) Everyday (19) Standard prime (6) Telephoto (17) Wedding & event (12) Macro (5) Portrait (11) Sports & action (15) Wildlife (10)
All lenses for the Canon EOS R50 V · the same use across mounts: Low-light lenses for Canon RF · all cameras