SG-image
AF 25mm ƒ/1.8
SG-image AF 25mm F1.8
SG-image AF 25mm ƒ/1.8 is a 25mm prime lens for the Fujifilm X mount, equivalent to 38mm on full frame, with a maximum aperture of ƒ/1.8 and autofocus. It weighs 141 g.
Black · 5 finishes
Photo SG-imageOptics
- Type
- Prime · Photo
- Focal length
- 25mm (38mm eq.)
- Angle of view
- ≈ 59°
- Aperture
- ƒ/1.8 – ƒ/16
- Blades
- 9
- Aperture ring
- —
- Construction
- 7 el. / 5 gr.
- Special elements
- 3 high-refractive-index elements
- Designed for
- APS-C
Focus
- Type
- Autofocus, stepping motor
- Minimum distance
- 0.30 m
- Magnification
- —
Size and mount
- Diameter × length
- 67 × 33 mm
- Weight
- 141 g
- Filter
- 52 mm front
- Mount
- Native X mount
Features
- Yes
- Electronic contacts, Pancake
- No
- —
History
- Maker
- SG-image · CN
- Announced
- 2025-06
- Status
- Current
The launch press release gave about 145 g and 32 mm; the current distributor table gives 141 g and 33 mm for X (length without mount). "Type II" (2026) only changes the yellow rubber ring to black; same specifications and firmware. Silver Limited has an all-silver barrel, hood and focus ring. Red and orange were sold only via 2ndfocus and Amazon in Japan.
+ Sources 05· checked 2026-11-03
- 1Official store listing (X mount, black and silver, in stock)
- 2Official Japanese distributor store, specification table (X: 141 g, 67 x 33 mm); Type II and Silver Limited variants
- 3Distributor press release: Japanese launch 2025-06-30, STM stepping motor
- 4Silver Limited (Fujifilm X) released 2026-01-23
- 5Official store page for its matching hood calls the AF 25mm F1.8 and AF35mm F2.2 pancake-style lenses