Brightin Star MF 7.5mm F2.8 IV Review

The Brightin Star MF 7.5mm f/2.8 IV is a manual fisheye lens for mirrorless APS-C cameras like those from Fujifilm. With its extremely short focal length, it offers photographers a compact option to deliberately use unusual perspectives and strong image distortion as a creative element.

Brightin Star MF 7.5mm f/2.8 IV fisheye lens with hood on a wooden table, soft natural light, green plant in background

Technical Data and Optical Construction

The Brightin Star MF 7.5mm f/2.8 IV is specifically designed for camera systems with APS-C format sensors. On a Fujifilm camera, the effective focal length corresponds to approximately 11 millimeters in full-frame format, considering the usual crop factor.

The lens covers a diagonal angle of view of nearly 180 degrees, allowing extremely wide subject capture. The maximum aperture is f/2.8, which permits solid exposure even in lower ambient light. The lens can be stopped down continuously to a minimum aperture of f/16.

The optical construction consists of several glass elements housed in a solid barrel. As this is a purely manual lens, there are no electronic contacts to the camera. This means that no information about aperture or focal length is recorded in the EXIF data of the image files. Automatic focus control is also completely absent. Focusing is done manually via the focus ring.

The minimum focusing distance is very short, just a few centimeters from the front lens. A built-in lens hood protects the strongly curved front element from mechanical impact and stray light.

A conventional filter thread is not available due to the curved design of the lens. Instead, a 27mm filter can be attached at the rear.

The package includes a protective cap that fits precisely over the lens hood. The weight of the optic is very low at just under 200 grams, and the dimensions are extremely compact.

Hand holding a black camera with Brightin Star MF 7.5mm F2.8 IV fisheye lens cap against a plain white background

Hands holding a black compact camera with a Brightin Star MF 7.5mm f/2.8 IV fisheye lens and lens hood on a white background.

Hand holding a Brightin Star MF 7.5mm f/2.8 IV fisheye lens, rear mount visible against a clean white background

In Practice with the Brightin Star 7.5mm f/2.8 IV

Fisheye view of glass geodesic dome greenhouse in botanical garden under bright sunny blue sky

First Impression and Build Quality

The first tactile test after unboxing the Brightin Star 7.5mm f/2.8 IV is consistently positive. The lens is very solidly built and entirely made of metal, conveying a pleasant sense of quality.

Mounted on a Fujifilm camera, the small optic looks good. The black metal body blends seamlessly with the classic design of the camera. The lens looks very stylish and chic on the Fujifilm camera, forming a balanced unit with the camera body.

Sunlit fisheye view inside geodesic glass dome greenhouse with tall trees, plants and cobblestone seating

Low angle fisheye view looking up at towering evergreen trees silhouetted against bright sky in sunlit forest

In practical handling tests, however, one point becomes apparent. The aperture ring from the manufacturer rotates smoothly and has no noticeable detents. In everyday use, it turns out that this Brightin Star aperture ring is a bit too sensitive. Because the ring rotates very easily, it can easily happen that you unintentionally change the set aperture when adjusting focus or gripping the camera.

Here, a click stop at each aperture value would have been better to prevent unnoticed adjustment during work. Apart from this characteristic, the mechanical construction of the lens leaves a robust impression.

Fujifilm X-T20 camera equipped with Brightin Star MF 7.5mm f/2.8 IV fisheye lens resting on a warm wooden table

Fujifilm camera with Brightin Star MF 7.5mm f/2.8 IV fisheye lens on wooden surface, top-down view of manual dials

Black Fujifilm X-T20 mirrorless camera with a Brightin Star MF 7.5mm f/2.8 IV fisheye lens on a wooden surface

The Peculiarities of the Extreme Focal Length

Working with a focal length of 7.5mm presents an interesting challenge. This focal length restricts you in a certain way, as the wide angle of view does not suit every subject. At the same time, it gives you many interesting creative possibilities if you engage intensively with the optics and seek unusual angles. Vertical and horizontal lines curve strongly as soon as they do not run exactly through the center of the image, giving spaces and landscapes a dynamic effect.

Bright red arum berry spikes on tall stems in sunlit woodland clearing with pine trees and blue sky

What someone using the lens for the first time will surely find surprising is the clear difference between perception in the viewfinder and the actual environment. When you look through the electronic viewfinder, the chosen subject appears very small and far away.

However, when you take the camera away from your eye, you are astonished to find that you are standing directly in front of the subject. This optical effect requires a change in your habits. You have to get much closer to objects than you are used to with standard focal lengths to fill the frame meaningfully.

Day of the Dead sugar skull figurine with flower crown, captured with Brightin Star 7.5mm fisheye lens showing curved distortion

Sugar skull figurine with red rose crown and green shawl, shot with Brightin Star 7.5mm fisheye lens

Day of the Dead sugar skull figurine with red roses photographed with a 7.5mm fisheye lens, shallow depth of field

Camera with Brightin Star 7.5mm fisheye lens on tripod, flip-out screen showing sugar skull mannequin with Day of the Dead roses

Tips for Optimal Everyday Use

To achieve quick and sharp results when photographing with the manual fisheye, some settings on the Fujifilm camera prove very helpful.

As a first step, you should enable Focus Peaking in the camera menu. This function highlights sharp contours in the viewfinder in color and noticeably simplifies manual focusing. Although focusing at 7.5mm is quite straightforward due to the large depth of field, this focusing aid provides reliable orientation for close-up shots.

Wide fisheye view of stone pathway through lush palm plants inside bright glass geodesic dome greenhouse

Additionally, it is useful to use the zoom function of the electronic viewfinder. With a simple press of the camera's control dial, you can magnify the selected image section to precisely control the focus point.

Besides camera settings, the extremely wide angle of view of almost 180 degrees also requires some discipline in how you hold the camera. Constant care must be taken with your fingers on the lens barrel, as they can quickly appear at the edge of the frame if you are not careful. Likewise, be careful with your feet, because if you tilt the camera slightly downward, your own shoe tips can easily enter the frame.

Ultra-wide view of patinated bronze statues in city square with historic red brick church tower behind

Tall red-brick church with clock tower and rose window above curved street, fisheye ultra-wide view on cloudy day

Sony mirrorless camera with orange strap on mesh bench beside lush hedge along curved cobblestone botanical garden path

A practical trick also applies to accessories. Use a hand strap instead of a neck strap to get very close to subjects and reach unusual positions. A neck strap can get in the way when the camera is positioned low near the ground.

A flexible hand strap, on the other hand, provides full freedom of movement, allowing the camera to be easily guided just above the ground or held high above your head to discover new perspectives.

Black and white low-angle view looking up a massive tree trunk into dense leafy canopy against bright sky

Weathered blue pedestrian sign showing woman and child beside a dirt path under shady trees in a dry park

Black and white fisheye close-up of a grass seed head in a windswept meadow with blurred trees behind

Image Quality in Practical Use

The image sharpness of the Brightin Star 7.5mm f/2.8 IV shows solid performance in the center at open aperture f/2.8. For everyday subjects and creative experiments, the sharpness in the center is already completely sufficient. Stopping down to values like f/5.6 or f/8 noticeably increases sharpness in the center and shows clear detail rendering.

Fisheye view of empty tram tracks and city street lined with brick buildings and trees under pale evening sky

Fisheye view of lush bush with pink blossoms beside park path under sunny blue sky with clouds

Green leafy branch in sharp focus beside a winding paved path through lush dense forest in soft light

Towards the outermost edges and corners, sharpness drops off somewhat due to the design. For a fisheye in this price and size class, this edge sharpness falloff is a normal optical phenomenon. Vignetting is visible at the corners at f/2.8, but decreases significantly with slight stopping down.

Chromatic aberration on high-contrast edges occasionally occurs in strong backlight, but remains within a moderate range. The imaging performance is down-to-earth and honest for the intended purpose.

Dramatic black and white fisheye view looking up at geodesic glass dome with silhouetted trees and clouds

Fisheye view of motion-blurred cars on a curved tree-lined city street under pale evening sky

Tall pine trees curving with fisheye distortion over a shaded forest path in bright sunlight

Correcting Distortion with Lightroom

For photographers who want to reduce the typical fisheye curvature, the manufacturer provides a correction profile on their website. This profile can be loaded into editing programs like Adobe Lightroom to digitally convert the barrel distortion to straight lines.

Historic red-brick church with clock tower and rose window on curved street, dramatic fisheye view in overcast light — Uncorrected

Wide-angle view of historic red brick church with tall tower and rose window on city street under overcast sky — Corrected

Fisheye city street corner view with curved modern glass tower, parked bicycles and overcast sky

Wide-angle city street view with modern brick building and glass tower, parked bicycles and pedestrian on overcast day

Ultra-wide fisheye view of quiet empty covered market aisle with closed stalls and red graffiti kiosk

Empty covered market aisle with closed shuttered stalls and red kiosk with graffiti under white canopy

Fisheye low-angle view of curved brick church facade with teal double door and tall arched window above on cobblestone street

Low angle view of historic brick church facade with teal double door and tall leaded window above cobblestone street

Wide fisheye view of busy riverside beer garden with diners, Rhine river and TV tower under cloudy sky

High-angle view of crowded riverside beer garden along the Rhine with Rhine Tower in distance under cloudy sky

Sunny riverside promenade lined with trees, people relaxing on benches and cycling past brick buildings

Wide-angle view of sunny tree-lined riverside promenade with people on benches, cyclists, cafes and bridge in distance

Wide cobblestone riverside plaza with historic tower, cable-stayed bridge and scattered people under cloudy sky

Wide cobblestone riverside plaza with historic tower, distant bridge and strolling people under cloudy sky

In practice, however, this digital adjustment shows a mixed picture. Personally, I don't really like the corrected look. The digital rectification of the images stretches the corners extremely, leading to a noticeable loss of sharpness at the edges.

Moreover, the actual character that makes a fisheye lens what it is gets lost. The curved optics are intended as a creative tool. If you want a straight wide-angle photo, you usually achieve more balanced results with a true wide-angle lens than by subsequent alignment in software.

Overhead fisheye view of a large spiky grass tree plant inside a bright glass greenhouse dome on a sunny day

Swirling motion blur of tall tree trunk looking up to green canopy and bright sky, abstract dizzy effect

Swirling fisheye view looking up at blurred tree canopy and apartment buildings under bright sky

Overhead view of large star-shaped green plant with long veined leaves radiating in sunny greenhouse

Curved stone staircase between concrete walls with Colombia graffiti leading to person at top with red umbrellas

Curved historic brick building with green shutters captured with fisheye distortion on a quiet cobblestone street

Wide fisheye view of curved cobblestone street with apartment blocks, brick church and road sign on overcast day

Cyclist in white helmet racing down city street with motion blur, spectators and trees streaked in background

Conclusion

The Brightin Star MF 7.5mm f/2.8 IV proves to be a handy specialty lens for creative photography projects in everyday testing. What I like about the lens is that it is relatively compact. Especially compared to other lenses in this focal length range, particularly in full-frame, it is pleasantly small, even if you certainly pay for this partly with compromises in image quality.

For me, compactness is clearly more important here because, for me personally, it is a less frequently used focal length. The larger the lens, the lower the chance that I will take it with me and not leave it at home.

The solid metal construction, the handy form, and the appealing exterior fit well with the Fujifilm system. The aperture ring without detents requires some attention in handling but does not impair the core function.

The image quality is good in the center and absolutely practical for the given size. If you are looking for a light and affordable fisheye for occasional experiments, this prime lens offers an interesting option.

Fujifilm X-T20 with Brightin Star MF 7.5mm f/2.8 IV fisheye lens on a white surface, bathed in sunlight with soft shadows.

Fujifilm X-T20 camera body mounted with a Brightin Star MF 7.5mm f/2.8 IV fisheye lens on a white surface in bright sunlight

Buy

The Brightin Star MF 7.5mm f/2.8 IV lens is available through various retail channels. An easy ordering option is available on well-known online platforms like Amazon. Alternatively, the lens can be purchased directly from the manufacturer's official store at Brightin Star Official Store. When purchasing, be sure to select the correct mount for your camera system to ensure compatibility with the Fujifilm X mount.

More Sample Images

All images in this article were taken with the Brightin Star MF 7.5mm f/2.8 IV and the Fujifilm X-T20 or Fujifilm X-E5. All images were edited with Adobe Lightroom.

Fujifilm X-T20