SG-image
18mm ƒ/6.3
SG-image MF 18mm f6.3 APS-C Ultra Slim Pancake Lens
SG-image 18mm ƒ/6.3 is an 18mm prime lens for the Fujifilm X mount, equivalent to 27mm on full frame, with a maximum aperture of ƒ/6.3 and manual focus. It weighs 78 g.

Black · 2 finishes
Photo SG-imageOptics
- Type
- Prime · Photo
- Focal length
- 18mm (27mm eq.)
- Angle of view
- ≈ 76°
- Aperture
- ƒ/6.3
- Blades
- —
- Aperture ring
- —
- Construction
- 6 el. / 4 gr.
- Special elements
- 2 high-refractive-index elements
- Designed for
- APS-C
Focus
- Type
- Manual
- Minimum distance
- 0.20 m
- Magnification
- —
Size and mount
- Diameter × length
- 60 × 14 mm
- Weight
- 78 g
- Filter
- 37 mm front
- Mount
- Native X mount
Features
- Yes
- Pancake
- No
- Electronic contacts
History
- Maker
- SG-image · CN
- Announced
- —
- Status
- Current
Fixed F6.3 aperture. Filter 37 mm on the lens, 49 mm on the hood. Size excludes mount and hood. A "60th ULTRAMAN Limited Edition" with the same specifications was sold in Japan in 2026. The distributor says "release without lens" must be enabled, so the lens has no electronic contacts.