Sigma 18-250mm f/3.5-6.3 DC OS Macro HSM Specs & DoF

18–250 mm

Focal length

f/3.5–6.3

Maximum aperture

76°–6°

Diagonal angle of view (APS-C)

APS-C

Designed for

13.9×

Zoom ratio

Specifications#

Brand: Sigma
Model: 18-250mm f/3.5-6.3 DC OS Macro HSM
Lens type: Macro
Focal length: 18–250 mm
Maximum aperture: f/3.5–6.3
Image circle: APS-C (23.5×15.6 mm)
Mount(s): Canon EF, Sigma SA, Nikon F, Sony / Minolta A-mount, Pentax K
Projection: Rectilinear
Stabilisation: Yes (optical)
Autofocus motor: hypersonic (HSM)
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 18 mm	At 67 mm	At 250 mm	Equiv. aperture (DoF)
APS-C	27 mm · 76°	100 mm · 24°	375 mm · 6°	f/5.2
APS-C (Canon)	29 mm · 73°	107 mm · 23°	400 mm · 6°	f/5.6
Micro Four Thirds	36 mm · 62°	134 mm · 18°	500 mm · 5°	f/7.0

Depth of field & background blur#

Computed on its native APS-C format (CoC 20 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: 20 mm f/4 on aps-c.

Focal	Aperture	at 1 m	at 2 m	at 5 m	at 10 m	Hyperfocal	Blur @2 m
18 mm	f/3.5	43.4 cm	2.03 m	∞	∞	4.75 m	0.2%
18 mm	f/4	50.2 cm	2.48 m	∞	∞	4.16 m	0.2%
18 mm	f/8	1.22 m	45.6 m	∞	∞	2.09 m	0.1%
67 mm	f/3.5	2.8 cm	11.8 cm	75.7 cm	3.10 m	65.6 m	2.8%
67 mm	f/4	3.3 cm	13.5 cm	86.6 cm	3.57 m	57.4 m	2.5%
67 mm	f/8	6.5 cm	27.1 cm	1.77 m	7.87 m	28.8 m	1.2%
250 mm	f/3.5	0.2 cm	0.8 cm	5.2 cm	21.4 cm	913 m	43.4%
250 mm	f/4	0.2 cm	0.9 cm	5.9 cm	24.4 cm	799 m	38.0%
250 mm	f/8	0.4 cm	1.8 cm	11.9 cm	48.8 cm	400 m	19.0%

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 18 mm	NPF at 18 mm, f/3.5
APS-C	1/400 s	19 s	13 s
APS-C (Canon)	1/400 s	17 s	13 s
Micro Four Thirds	1/500 s	14 s	12 s

Compatible cameras#

Bodies in our database with a native Canon EF, Sigma SA, Nikon F, Sony / Minolta A-mount and Pentax K mount. Full-frame bodies switch to an APS-C crop with this lens.