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 75 mm | At 150 mm | At 300 mm | Equiv. aperture (DoF) |
|---|---|---|---|---|
| Full frame | 75 mm · 32° | 150 mm · 16° | 300 mm · 8° | f/4.0 |
| APS-C | 112 mm · 21° | 225 mm · 11° | 450 mm · 5° | f/6.0 |
| APS-C (Canon) | 120 mm · 20° | 240 mm · 10° | 480 mm · 5° | f/6.4 |
| Micro Four Thirds | 150 mm · 16° | 300 mm · 8° | 600 mm · 4° | f/8.0 |
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. Full table: 85 mm f/4 on full frame.
| Focal | Aperture | at 1 m | at 2 m | at 5 m | at 10 m | Hyperfocal | Blur @2 m |
|---|---|---|---|---|---|---|---|
| 75 mm | f/4 | 3.9 cm | 16.5 cm | 1.06 m | 4.43 m | 47.0 m | 2.0% |
| 75 mm | f/8 | 7.9 cm | 33.1 cm | 2.20 m | 10.3 m | 23.5 m | 1.0% |
| 150 mm | f/4 | 0.9 cm | 3.9 cm | 25.9 cm | 1.05 m | 188 m | 8.4% |
| 150 mm | f/8 | 1.8 cm | 7.9 cm | 51.9 cm | 2.12 m | 93.9 m | 4.2% |
| 300 mm | f/4 | 0.2 cm | 0.9 cm | 6.3 cm | 25.9 cm | 750 m | 36.8% |
| 300 mm | f/8 | 0.4 cm | 1.8 cm | 12.5 cm | 51.8 cm | 375 m | 18.4% |
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 75 mm | NPF at 75 mm, f/4 |
|---|---|---|---|
| Full frame | 1/320 s | 7 s | 4 s |
| APS-C | 1/500 s | 4 s | 3 s |
| APS-C (Canon) | 1/500 s | 4 s | 3 s |
| Micro Four Thirds | 1/640 s | 3 s | 3 s |
Compatible cameras#
Bodies in our database with a native Canon EF mount.
- Canon EOS-1D X Mark III 2020
- Canon EOS 6D Mark II 2017
- Canon EOS 5D Mark IV 2016
- Canon EOS-1D X Mark II 2016
- Canon EOS 5DS 2015
- Canon EOS 5DS R 2015
- Blackmagic Design Pocket Cinema Camera 2013
- Canon EOS 5D Mark III 2012
- Canon EOS 6D 2012
- Canon EOS-1D X 2012
- Canon EOS-1D C 2012
- Canon EOS-1D Mark IV 2009
- Canon EOS 5D Mark II 2008
- Canon EOS-1Ds Mark III 2007
- Canon EOS-1D Mark III 2007
- Canon EOS 5D 2005
- Canon EOS-1Ds Mark II 2004
- Kodak DCS Pro SLR/c 2004
- Canon EOS-1D Mark II 2004
- Canon EOS 30V 2004
- Canon EOS-1Ds 2002
- Canon EOS 3000N 2002
- Canon EOS 300V 2002
- Canon EOS-1D 2001
- Canon EOS-1V 2000
- Canon EOS 30 2000
- Canon EOS D2000 1998
- Canon EOS-3 1998
- Canon EOS 500N 1996
- Canon EOS IX 1996
- Canon EOS 50 1995
- Canon EOS-1N 1994
- Canon EOS 500 1993
- Canon EOS 5 1992
- Canon EF-M camera 1991
- Canon EOS 100 1991
- Canon EOS 1000 1990
- Canon EOS-1 1989
- Canon EOS 650 1987
- Canon EOS C300
Adapt it to other systems#
Similar lenses#
- Canon EF 75-300mm f/4-5.6 IS USM f/4–5.6
- Canon EF 80-200mm f/2.8L f/2.8
- Canon EF 80-200mm f/4.5-5.6 f/4.5–5.6
- Sigma 80-400mm f/4.5-5.6 EX DG OS f/4.5–5.6
- Tamron AF 80-210mm f/4.5-5.6 280D f/4.5–5.6
- Tokina 80-200mm f/4.5-5.6 SZ-X f/4.5–5.6
- Tokina AF 80-200mm f/2.8 AT-X 828 Pro f/2.8
- Tokina AT-X AF SD 80-400mm f/4.5-5.6 f/4.5–5.6
- Canon EF 70-200mm f/2.8L IS II USM f/2.8
- Sigma 70-200mm F2.8 DG OS HSM | S f/2.8
- Canon EF 70-200mm f/2.8L IS II USM + EF 2× III ext. f/2.8
- Canon EF 70-200mm f/2.8L IS USM f/2.8
Frequently asked questions#
Is the Canon EF 75-300mm f/4-5.6 III USM full frame?
Yes — it covers the full 36 × 24 mm frame.
What is the Canon EF 75-300mm f/4-5.6 III USM equivalent to on APS-C?
On a 1.5× APS-C body it frames like 112–450 mm, and like 120–480 mm on Canon APS-C.
What is the Canon EF 75-300mm f/4-5.6 III USM good for?
As a telephoto zoom it suits sport, wildlife, events and compressed landscapes.
Sources & licences#
- Lensfun lens database — CC BY-SA 3.0
Last updated October 03, 2026 · How we calculate · Sources