Carl Zeiss Tele-Tessar T* 85mm f/4 ZM

Carl Zeiss Tele-Tessar T* 85mm f/4 ZM

Among the slower lenses in the Zeiss ZM line for Leica M cameras, the Tele-Tessar T* 85mm f/4 stands out for trading aperture speed in return for unusually compact size, low weight, and consistently high optical quality. Released in late 2008, it was built around a simple long-focus arrangement of five elements in three groups, a deliberately pure design that reviewers credit for its even performance across the frame [1]. The modest f/4 maximum aperture is the main compromise, but it is also what keeps the lens small, and many users regard it as one of the most under-appreciated short teles available in M mount, particularly for travel and landscape work [2].

The lens is manual focus with rangefinder coupling, focusing from its 0.9 m minimum distance to infinity over roughly 85 degrees of a well-damped metal helicoid [1]. The aperture is set by a metal ring at the front of the barrel that runs from f/4 to f/22 in third-stop clicks, and the ten-bladed diaphragm contributes to clean ten-point sunstars [1]. Build quality follows the rest of the ZM family, with a precise mechanical feel and durable anodized finish, and the lens accepts 43 mm filters [1]. At around 310 g it is light for a high-quality short tele, and the bayonet-fit metal hood threads for 46 mm accessories, though the genuine Zeiss hood has been noted as expensive [1]. Because the optics are well corrected close up, the lens adapts cleanly to mirrorless bodies, often paired with a helicoid adapter to exploit its strong close-range rendering [1].

The lens was offered in black and silver finishes, carrying Zeiss order numbers 1486-395 for the black version and 1486-396 for the silver, both fitted with the T* anti-reflective coating and a manual-focus design [3]. It does not feature Leica six-bit coding. Zeiss has since discontinued the lens, so used examples are the usual route to ownership [2].

Optical qualities

Rendering The Tele-Tessar 85mm f/4 has a reputation for being sharp and contrasty across its aperture range, with reviewers describing it as world-class from f/5.6 and very strong even wide open [1]. Color rendering is generally described as neutral to slightly warm [1]. Independent testing on high-resolution sensors found the centre and mid-frame excellent at f/4 and outstanding everywhere by f/5.6 to f/8, with diffraction only beginning to soften contrast by f/11 [1].

Bokeh and transitions Background blur is necessarily limited by the f/4 aperture, but at portrait distances the out-of-focus rendering is described as smooth and free of onion-ring or harsh outlining, even with busy backgrounds [1].

Flare resistance Flare control is generally very good, with the sun in frame handled well in most positions. A narrow range of sun angles just outside the frame can provoke contrast loss, easily managed by shading the lens or using a deeper hood [1].

Distortion and vignetting Distortion is very low, and vignetting is described as minimal in practice [1][2].

Aberrations The lens shows some longitudinal chromatic aberration wide open, seen as slight magenta and green fringing near the focus plane at close distances, which improves on stopping down to f/5.6 and f/8. Lateral chromatic aberration is very low [1].

Digital use As a moderate telephoto, the lens performs well on unmodified mirrorless sensors, where shorter wide-angle ZM lenses can struggle, making it a popular adapted option as well as a native M lens [1].

History

Development and Launch Zeiss introduced the Tele-Tessar T* 4/85 in late 2008 as part of the ZM lens range designed for Leica M-mount and Zeiss Ikon rangefinder cameras [1]. Within the ZM lineup it filled the role of a compact, high-quality short telephoto, complementing the faster but larger options that buyers might otherwise consider in the 75 to 90 mm range [2].

Collector Notes A practical point for rangefinder users is that the 85 mm field of view is noticeably wider than the 90 mm framelines available on most Leica M bodies, which affects framing accuracy [2]. The lens was sold in black (1486-395) and silver (1486-396) versions, both with the T* coating, and confirming the order number and finish is useful when verifying a used example [3]. Because the lens is discontinued, buyers should expect to shop the used market, where prices can vary widely [2]. Worth checking before purchase are the focus calibration and rangefinder coupling, the condition of the anodized finish, and whether the genuine bayonet hood and caps are included, since the Zeiss hood is comparatively costly to replace [1].

Sources

• [1] David Braddon-Mitchell, phillipreeve.net. Carl Zeiss Tele-Tessar (ZM) T 4/85: A Detailed Review*. https://phillipreeve.net/blog/carl-zeiss-tele-tessar-zm-t-4-85-a-detailed-review/
• [2] Leica Rumors (review by Jack Takahashi). Zeiss Tele-Tessar T 4/85 ZM lens review*. https://leicarumors.com/2021/05/30/zeiss-tele-tessar-t-4-85-zm-lens-review.aspx/
• [3] B&H Photo Video. ZEISS Tele-Tessar T 85mm f/4 ZM Lens (Black) 1486-395*. https://www.bhphotovideo.com/c/product/583973-REG/Zeiss_1486_395_85mm_f_4_Tele_Tessar_T.html