Samyang 8mm f/3.5 Fish-Eye CS Specs & DoF

8 mm

Focal length

f/3.5

Maximum aperture

139°

Diagonal angle of view (Full frame)

Full frame

Designed for

Specifications#

Brand: Samyang
Model: 8mm f/3.5 Fish-Eye CS
Lens type: Ultra-wide prime
Focal length: 8 mm
Maximum aperture: f/3.5
Image circle: Full frame (36×24 mm)
Mount(s): Pentax K, Canon EF, Nikon F, Fujifilm X-mount, Sony / Minolta A-mount, Sony E-mount, Four Thirds, Micro Four Thirds, Samsung NX
Projection: Rectilinear
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 Pentax K, Canon EF, Nikon F, Fujifilm X-mount, Sony / Minolta A-mount, Sony E-mount, Four Thirds, Micro Four Thirds and Samsung NX mount.

Adapt it to other systems#

Sony E-mount Canon RF Nikon Z Fujifilm X-mount Micro Four Thirds L-Mount Canon EF-M Fujifilm G-mount Hasselblad XCD Nikon 1 (CX)Pentax Q Samsung NX Canon EF Nikon F

Similar lenses#

Samyang 8mm f/2.8 UMC Fish-eye f/2.8
Laowa 7.5mm f/2.0 f/2
Laowa 9mm f/2.8 Zero-D f/2.8
Laowa 9mm f/5.6 FF RL f/5.6
Panasonic Leica DG Summilux 9mm f/1.7 Asph. f/1.7
Viltrox AF 9mm f/2.8 Z/E/XF f/2.8
Laowa 10mm f/2.8 Zero-D FF f/2.8
Samyang 10mm f/2.8 ED AS NCS CS f/2.8
Voigtländer Heliar-Hyper Wide 10mm F5.6 f/5.6
Samyang XP 10mm f/3.5 f/3.5
Sony E 11mm f/1.8 f/1.8
Laowa 12mm f/2.8 Zero-D f/2.8

Frequently asked questions#

Is the Samyang 8mm f/3.5 Fish-Eye CS full frame?

Yes — it covers the full 36 × 24 mm frame.

What is the Samyang 8mm f/3.5 Fish-Eye CS 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 Samyang 8mm f/3.5 Fish-Eye CS good for?

As a ultra-wide prime it suits astrophotography, landscapes and dramatic perspectives.

Sources & licences#

Lensfun lens database — CC BY-SA 3.0