TTArtisan 90mm f/1.25 Mirrorless Version

The TTArtisan 90mm f/1.25 is a manual-focus portrait prime for medium format mirrorless cameras. It is sold in Fujifilm G and Hasselblad X mount versions, and each version fits only its own system. On these larger sensors, 90mm gives a short telephoto view that flatters faces and leaves a natural working distance between you and the subject.

The f/1.25 maximum aperture is the main reason to own this lens. The trade-off is effort: focusing is entirely manual, and the plane of sharpness is thin enough that each focus setting matters. For seated portraits and still life, where you set the pace, the effort is easy to accept.

TTArtisan introduced this mirrorless version in 2021.

The front of the lens accepts 77mm screw-in filters. Any filter you screw directly onto the lens must match this 77mm thread. Both mount versions share this thread, so one filter set serves either body. Because the lens opens to f/1.25, an ND filter lets you keep that aperture in bright daylight without overexposing.

The 90mm focal length and the f/1.25 aperture work together for portraits, still life and quiet detail work. Closest focus is 3.3 ft (100 cm). That is enough for a head-and-shoulders portrait while keeping a comfortable distance from your subject.

The f/1.25 opening admits an unusual amount of light. In a window-lit room or an evening studio you can keep ISO settings low instead of raising sensitivity. Stopped down slightly for a touch more depth of field, the lens still gathers light quickly.

Depth of field at f/1.25 is extremely thin. A sitter's eyes stay sharp while ears, hair and the background fall away into soft blur. This suits a single subject and a calm, deliberate way of shooting. Ten aperture blades keep the opening round when you stop down, helping out-of-focus highlights stay smooth rather than angular.

Because focusing is manual, allow time for each frame. Move the ring, check the eyes, then fine-tune before you release the shutter. Fast-moving subjects are a poor match for this lens. Focus peaking and magnification, where your camera offers them, speed up the check.

This lens has no built-in image stabilisation. When the light drops, support the camera on a tripod or monopod, or brace it carefully for handheld frames. That support keeps the camera steady, but it cannot stop a moving subject from blurring.

There is no weather sealing. Keep the lens protected from rain, spray, dust and sand, because none of the joints resist moisture. A rain cover or a simple shelter covers most location risks. The front element also lacks a fluorine coating, so dust and fingerprints need gentle cleaning with a proper cloth.

The optical design has 11 elements in 7 groups. There are no aspherical, low-dispersion or other special-glass elements. These figures describe the layout of the design, not a measured level of image quality, so judge results from real frames before buying.