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 fits all Micro Four Thirds cameras. There its field of view equals 100 mm in full-frame terms (crop factor 2).

Micro Four Thirds cameras

Micro Four Thirds:: OM System PEN, OM System OM-3, OM System OM-5 Mark II, Panasonic Lumix G97 (G99M2), Panasonic Lumix GH7, OM System OM-1 Mark II, Panasonic Lumix G9 II, Panasonic Lumix G100D, OM System OM-5, OM System OM-1, Panasonic Lumix GH6, Panasonic Lumix GH5 II, Olympus PEN E-P7, Olympus OM-D E-M10 Mark IV, Olympus OM-D E-M1 Mark III, Panasonic Lumix G100 (G110), Panasonic Lumix BGH1, Olympus PEN E-PL10, Olympus OM-D E-M5 Mark III, Panasonic Lumix G95 (G90, G91), Olympus OM-D E-M1X, Panasonic Lumix GX9, Panasonic Lumix GF10 (GF90, GX880), Olympus PEN E-PL9, Panasonic Lumix GH5S, Blackmagic Pocket Cinema Camera 4K, Panasonic Lumix G9, Olympus OM-D E-M10 Mark III, Panasonic Lumix GF9 (GX850, GX800), Panasonic Lumix GH5, Olympus PEN E-PL8, Olympus OM-D E-M1 Mark II, Panasonic Lumix G85 (G80, G81), Panasonic Lumix GX85 (GX80, GX7 Mark II), Olympus PEN-F, Olympus OM-D E-M10 Mark II, Panasonic Lumix GX8, Panasonic Lumix G7, Panasonic Lumix GF7, Olympus OM-D E-M5 Mark II, Panasonic Lumix GM5, Olympus PEN E-PL7, Panasonic Lumix GH4, Olympus OM-D E-M10, Panasonic Lumix GM1, Olympus OM-D E-M1, Panasonic Lumix GX7, Olympus PEN E-PL6, Olympus PEN E-P5, Panasonic Lumix G6, Panasonic Lumix GF6, Blackmagic Pocket Cinema Camera, Olympus PEN E-PM2, Olympus PEN E-PL5, Panasonic Lumix GH3, Panasonic Lumix G5, Panasonic Lumix GF5, Olympus OM-D E-M5, Blackmagic Cinema Camera (MFT)