Best low-light lenses for the Canon EOS R5 Mark II
12 low-light lenses that fit the Canon EOS R5 Mark II (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 12 low-light Canon RF lenses that fit the Canon EOS R5 Mark II — the full comparison is below.
Check the Canon RF 45mm f/1.2 STM price on Amazon →
One limit of this table: it lists only Canon RF lenses that mount natively on the Canon EOS R5 Mark II — lenses fitted through an adapter are not included here. See which mounts adapt to which.
Weight & weather sealing on the Canon EOS R5 Mark II
On long approaches the decision is often made by weight, not aperture. Published weights for 12 of the 12 lenses above:
| Lens | Weight | Weather sealing |
|---|---|---|
| Canon RF 50mm f/1.8 STM | 160g | None claimed |
| Canon RF 45mm f/1.2 STM | 346g | Not verified (weight from the Canon RF lens-mount list table; sealing not stated on the source page) |
| 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 35mm f/1.4 L VCM | 555g | 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.
Complete the kit for the Canon EOS R5 Mark II
- The Canon RF 45mm f/1.2 STM takes 67mm front filters. One 67mm set (polariser, ND) also fits every other 67mm lens you add later — see which ones. 67mm filters on Amazon →
- Batteries, cards, a strap and a bag are specific to the Canon EOS R5 Mark II rather than to the lens. Canon EOS R5 Mark II accessories on Amazon →
FAQ
What is the best low-light lens for the Canon EOS R5 Mark II?
Canon RF 45mm f/1.2 STM (45mm f/1.2) is the standout low-light option that fits the Canon EOS R5 Mark II. 12 low-light Canon RF lenses fit in total — compare them below.
Do these low-light lenses fit the Canon EOS R5 Mark II?
Yes — every lens here is a Canon RF mount lens, so it fits the Canon EOS R5 Mark II and covers its full-frame sensor.
What is the lightest low-light lens for the Canon EOS R5 Mark II?
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 12 of the 12 lenses on this page are in the weight table above.
Already own the Canon EOS R5 Mark II, shopping for a spare or an upgrade? Canon EOS R5 Mark II on Amazon →
All lenses for the Canon EOS R5 Mark II · the same use across mounts: Low-light lenses for Canon RF · all cameras