TTArtisan 75mm f/1.5 Swirly Bokeh

TTArtisan introduced this 75mm prime in 2024, and it remains in production. It covers full frame and uses an M42 screw mount. The focal length gives a short telephoto view, a natural fit for portraits and details. As its name says, the lens is built around a swirling background look.

That look suits photographers who enjoy slow, deliberate shooting. You focus by hand, so the lens favors portraits, still life and other subjects that hold still. The main trade-off is speed, because moving subjects are hard to follow without autofocus. Live view magnification or focus peaking makes that work faster and more reliable.

The lens weighs 1 lb 4.1 oz (570 g) and measures 2.87 in (73 mm) across by 2.83 in (72 mm) long. A screw-in filter must match the 58mm thread on the front.

On full frame, 75mm frames head-and-shoulder portraits from a comfortable working distance. The same length lets you photograph performers or speakers from the edge of a room without intruding. There is no zoom, so you change framing by stepping closer or farther back.

The f/1.5 maximum aperture gathers a lot of light. That keeps you shooting in dim interiors and at dusk without pushing ISO far. Wide open, a portrait background falls well out of focus, which separates the subject from its surroundings. The bright f/1.5 viewfinder image also makes manual focusing easier.

Thirteen aperture blades help keep the opening nearly round as you stop down. That round shape smooths out-of-focus highlights, so point lights render as soft round shapes rather than edged polygons. The swirling background the name promises suits portraits where atmosphere matters more than clean, neutral blur.

Closest focus is 2.5 ft (76 cm), a natural portrait working distance. Wide open, the plane of sharpness is thin. Place focus carefully on the eye, and stop down a little if you need more depth.

There is no image stabilization, so steadiness comes from you. A tripod, a monopod or a braced posture supports the camera, and a quicker shutter guards against blur. The f/1.5 aperture passes plenty of light, which makes a quicker handheld shutter possible. At 75mm, handheld evening portraits are where this matters most.

There is no weather sealing, so keep the lens dry and cased in rain or dust. No fluorine coating is fitted either, so fingerprints and water spots take more effort to wipe off the front glass.

The lens comes only in the M42 screw mount, a long-standing threaded standard that predates modern bayonet fittings. Check that your camera accepts that thread before buying.

Six elements in four groups form a simple layout. None of the six is listed as aspherical, bi-aspherical or special glass, so every surface is ordinary spherical glass. Few surfaces stand in the light's path. The Swirly Bokeh name makes the rendering goal clear.