Specifications#
Equivalent focal length on different cameras#
Field of view and depth-of-field equivalence when this lens is used on bodies with different sensor sizes (natively or via an adapter).
| Camera format | At 800 mm | Equiv. aperture (DoF) |
|---|---|---|
| Full frame | 800 mm · 3° | f/11.0 |
| APS-C | 1200 mm · 2° | f/16.5 |
| APS-C (Canon) | 1280 mm · 2° | f/17.6 |
| Micro Four Thirds | 1600 mm · 2° | f/22.0 |
Depth of field & background blur#
Computed on its native Full frame format (CoC 30 µm). “Blur @2 m” is the size of an out-of-focus point at infinity, as a percentage of frame width, with the subject at 2 m — a simple bokeh index.
| Focal | Aperture | at 1 m | at 2 m | at 5 m | at 10 m | Hyperfocal | Blur @2 m |
|---|---|---|---|---|---|---|---|
| 800 mm | f/8 | — | 0.2 cm | 1.6 cm | 6.9 cm | 2.7 km | 185.2% |
| 800 mm | f/11 | — | 0.2 cm | 2.2 cm | 9.5 cm | 1.9 km | 134.7% |
Handheld & night-sky limits#
NPF assumes typical 20–24 MP sensors (≈6 µm pixels on full frame, ≈3.9 µm on APS-C, ≈3.3 µm on Micro Four Thirds).
| Body | Min. handheld shutter (longest focal) | 500 rule at 800 mm | NPF at 800 mm, f/11 |
|---|---|---|---|
| Full frame | 1/800 s | 1 s | 1 s |
| APS-C | 1/1250 s | 0 s | 1 s |
| APS-C (Canon) | 1/1250 s | 0 s | 1 s |
| Micro Four Thirds | 1/1600 s | 0 s | 1 s |
Compatible cameras#
Bodies in our database with a native Canon RF mount.
- Canon EOS R6 Mark III 2025
- Canon EOS C50 2025
- Canon EOS R50 V 2025
- Canon EOS R5 Mark II 2024
- Canon EOS R1 2024
- Canon EOS R100 2023
- Canon EOS R50 2023
- Canon EOS R8 2023
- Canon EOS R10 2022
- Canon EOS R6 Mark II 2022
- Canon EOS R7 2022
- Canon EOS R3 2021
- Canon EOS R5 2020
- Canon EOS R6 2020
- Canon EOS RP 2019
- Canon EOS R 2018
- Canon EOS R5 C
- Canon EOS R6 V
- Canon EOS R8 Mark II
Adapt it to other systems#
Similar lenses#
Frequently asked questions#
Is the Canon RF 800mm F11 IS STM full frame?
Yes — it covers the full 36 × 24 mm frame.
What is the Canon RF 800mm F11 IS STM equivalent to on APS-C?
On a 1.5× APS-C body it frames like 1200 mm, and like 1280 mm on Canon APS-C.
What is the Canon RF 800mm F11 IS STM good for?
As a super-telephoto prime it suits birds, wildlife and field sports from a distance.
Sources & licences#
- Lensfun lens database — CC BY-SA 3.0
Last updated October 03, 2026 · How we calculate · Sources