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

Focal length: 50 mm
Aperture: f/1.4
Weight: 395 g
Filter diameter: 55 mm
Min. focus distance: 42 cm
Length: –

Overview

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.

Technical Specifications

min focal length: 50 mm
max focal length: 50 mm
max f (min zoom): f/1.4
max f (max zoom): f/1.4
min. aperture: f/16
Elements: 6
Groups: 5
Weight: 395 g (0.87 lb)
Filter diameter: 55 mm
min focus distance: 42 cm (16.54 in)
Length: –
Diameter: –

Simulate depth of field and angle of view

Which cameras does the Brightin Star MF 50mm F1.4 III APS-C fit?

The Brightin Star MF 50mm F1.4 III APS-C is designed for APS-C sensors. On APS-C Sony E-Mount cameras its field of view equals 75 mm in full-frame terms. Full-frame bodies use it in APS-C (crop) mode, recording only part of the sensor and fewer megapixels.

Sony E-Mount cameras

Full frame (in APS-C mode):: Sony A7R VI, Sony A7 V, Sony FX2, Sony A1 II, Sony A9 III, Sony A7C II, Sony A7CR, Sony ZV-E1, Sony A7R V, Sony A7 IV, Sony A1, Sony FX3, Sony A7S III, Sony A7C, Sony FX6, Sony A7R IV, Sony A9 II, Sony FX9, Sony A7 III, Sony A7R III, Sony A9, Sony A7R II, Sony A7S II, Sony A7 II, Sony A7S, Sony A7, Sony A7R
APS-C:: Sony ZV-E10 II, Sony A6700, Sony FX30, Sony ZV-E10, Sony A6600, Sony A6100, Sony A6400, Sony A6500, Sony A6300, Sony A6000, Sony A5100, Sony A5000, Sony A3000, Sony NEX-5T, Sony NEX-3N, Sony NEX-6, Sony NEX-5R, Sony NEX-F3