Brightin Star MF 50mm F1.4 III APS-C

The Brightin Star MF 50mm F1.4 III is a manual focus standard prime for APS-C and Micro Four Thirds cameras. It is offered for Sony E, Canon RF, Canon EF-M, Fujifilm X and Micro Four Thirds, and it appeared in September 2025. On APS-C the field of view matches about 75mm in full frame terms, and on Micro Four Thirds about 100mm, so it works as a portrait lens.

Optical design

The manufacturer manual lists 6 elements in 5 groups, an aperture range of F1.4 to F16 and an angle of view of 29.5 degrees. The design includes one ED and one HD element and an optical coating against flare and ghosting. The diaphragm has 9 blades, and the closest focusing distance is 0.42 m. The aperture control is smooth and stepless, which points to a de-clicked ring.

Focusing and handling

Focusing is manual with no electronic contacts, so the camera records no aperture data. Bundles are available that add a lens hood, a UV filter, a cleaning kit and a storage bag. A de-clicked aperture ring is useful for video because exposure changes are smooth, but it makes the f-number less obvious by feel.

Build and size

The manual gives 395 g and a filter thread of 55 mm. This is a compact lens.

Where it fits

For a faster aperture on APS-C the database has the Brightin Star's own MF 50mm F0.95, plus the TTArtisan 50mm f/1.2, the 7artisans 50mm F1.2 and the Samyang / Rokinon 50mm F1.2 ED AS UMC CS (E, X and MFT). The F1.4 III is the smaller and lighter of the group and is the lighter one by the manufacturer's figures.

Pros and cons

Pros

• F1.4 aperture with 9 blades
• About 395 g (manufacturer manual)
• Five mounts including EF-M and Micro Four Thirds
• Close focusing at 0.42 m
• Stepless aperture control for video

Cons

• Manual focus only
• No image stabilization
• Not a full frame lens
• No Nikon Z version listed

Verdict

The MF 50mm F1.4 III is a small, low cost manual portrait lens for APS-C and Micro Four Thirds. It suits users who want shallow depth of field and are happy to focus by hand, and anyone needing autofocus should look at other brands' APS-C options.