Thypoch · Eureka
Eureka 28mm ƒ/2.8 ASPH.
Eureka 28mm f/2.8 ASPH.
Thypoch Eureka 28mm ƒ/2.8 ASPH. is a 28mm prime lens for the Fujifilm X mount, equivalent to 42mm on full frame, with a maximum aperture of ƒ/2.8 and manual focus. It weighs 154 g.

Black · 2 finishes
Photo ThypochOptics
- Type
- Prime · Photo
- Focal length
- 28mm (42mm eq.)
- Angle of view
- ≈ 54°
- Aperture
- ƒ/2.8 – ƒ/16
- Blades
- 8
- Aperture ring
- Yes
- Construction
- 7 el. / 4 gr.
- Special elements
- 1 aspherical, 3 high-refractive-index elements (X-mount version)
- Designations
- ASPH.
- Designed for
- Full frame
Focus
- Type
- Manual
- Minimum distance
- 0.40 m
- Magnification
- —
Size and mount
- Diameter × length
- — × 26.9–29.3 mm
- Weight
- 154 g
- Filter
- 27 mm front
- Mount
- Native X mount
Features
- Yes
- Aperture ring, Pancake
- No
- —
History
- Maker
- Thypoch · CN
- Announced
- —
- Status
- Current
- Launch price
- $459 · 2026-04-28
Collapsible-style brass pancake lens. X-mount lengths are at infinity and at 0.4 m focus. Pre-orders opened November 2025, shipping announced 2026-04-28. Thypoch calls the finishes Pearl White and Matte Black; the store lists them as Silver and Black. The X version uses three HRI elements instead of two in the M version. Filter thread M27 (E27). Also sold as the M-mount lens plus an M-X adapter, which is not this product.