Specifications#
- Brand
- Sigma
- Model
- 8mm f/3.5 EX DG circular fisheye
- Lens type
- Fisheye
- Focal length
- 8 mm
- Maximum aperture
- f/3.5
- Image circle
- Full frame (36×24 mm)
- Projection
- Fisheye
- Lensfun correction profile
- Yes — distortion/vignetting/TCA
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 8 mm | Equiv. aperture (DoF) |
|---|---|---|
| Full frame | 8 mm · 139° | f/3.5 |
| APS-C | 12 mm · 121° | f/5.2 |
| APS-C (Canon) | 13 mm · 118° | f/5.6 |
| Micro Four Thirds | 16 mm · 107° | f/7.0 |
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: 14 mm f/4 on full frame.
| Focal | Aperture | at 1 m | at 2 m | at 5 m | at 10 m | Hyperfocal | Blur @2 m |
|---|---|---|---|---|---|---|---|
| 8 mm | f/3.5 | ∞ | ∞ | ∞ | ∞ | 61.8 cm | 0.0% |
| 8 mm | f/4 | ∞ | ∞ | ∞ | ∞ | 54.1 cm | 0.0% |
| 8 mm | f/8 | ∞ | ∞ | ∞ | ∞ | 27.5 cm | 0.0% |
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 8 mm | NPF at 8 mm, f/3.5 |
|---|---|---|---|
| Full frame | 1/8 s | 62 s | 38 s |
| APS-C | 1/13 s | 42 s | 30 s |
| APS-C (Canon) | 1/13 s | 39 s | 29 s |
| Micro Four Thirds | 1/15 s | 31 s | 28 s |
Compatible cameras#
Bodies in our database with a native Nikon F, Sigma SA and Canon EF mount.
- Nikon D6 2020
- Nikon D780 2020
- Canon EOS-1D X Mark III 2020
- Nikon D3500 2018
- Nikon D7500 2017
- Nikon D850 2017
- Canon EOS 6D Mark II 2017
- Nikon D5600 2016
- Nikon D3400 2016
- Nikon D500 2016
- Canon EOS 5D Mark IV 2016
- Canon EOS-1D X Mark II 2016
- Nikon D5 2016
- Nikon D5500 2015
- Nikon D7200 2015
- Canon EOS 5DS 2015
- Canon EOS 5DS R 2015
- Nikon D4S 2014
- Nikon D750 2014
- Nikon D810 2014
- Nikon D3300 2014
- Nikon D7100 2013
- Nikon D5300 2013
- Nikon D610 2013
- Nikon Df 2013
- Blackmagic Design Pocket Cinema Camera 2013
- Nikon D3200 2012
- Nikon D4 2012
- Nikon D5200 2012
- Nikon D600 2012
- Nikon D800 2012
- Canon EOS 5D Mark III 2012
- Canon EOS 6D 2012
- Canon EOS-1D X 2012
- Canon EOS-1D C 2012
- Nikon D5100 2011
- Sigma SD15 2011
- Nikon D7000 2010
- Nikon D3100 2010
- Nikon D3000 2009
Adapt it to other systems#
Similar lenses#
Frequently asked questions#
Is the Sigma 8mm f/3.5 EX DG circular fisheye full frame?
Yes — it covers the full 36 × 24 mm frame.
What is the Sigma 8mm f/3.5 EX DG circular fisheye equivalent to on APS-C?
On a 1.5× APS-C body it frames like 12 mm, and like 13 mm on Canon APS-C.
What is the Sigma 8mm f/3.5 EX DG circular fisheye good for?
As a fisheye it suits creative ultra-wide views, skateboarding, interiors and all-sky astro.
Sources & licences#
- Lensfun lens database — CC BY-SA 3.0
Last updated October 03, 2026 · How we calculate · Sources