Thypoch Simera 75mm f/1.4 ASPH.

Thypoch Simera 75mm f/1.4 ASPH.

The Simera 75mm f/1.4 ASPH. extended Thypoch's fast f/1.4 Simera family into medium-telephoto territory, arriving as the fourth and longest lens in the line after the 28mm, 35mm and 50mm models [1][2]. Despite its 75mm focal length and full f/1.4 aperture, the design is unusually compact for its class, roughly the size of the Voigtländer 75mm f/1.5 Nokton and only modestly heavier [3]. It is the only Simera to use an aspherical element, and Thypoch builds it around nine elements in eight groups, including ED glass and high-refractive-index elements to control aberrations [1][2].

Mechanically the lens is all-metal with a black finish and a 58mm filter thread. It uses a 16-blade aperture intended to keep the iris opening near-circular when stopped down, and the aperture ring carries a de-click lever so it can be used clicked for stills or smooth for video [1][3]. Reviewers describe the build as a step forward over earlier Simera lenses, with an even, pleasant focus action turning about 120 degrees from infinity to close focus [3]. The optics use a front-focusing arrangement in which the rear group stays fixed while the rest of the cell extends as the lens focuses closer, an approach that supports performance at short distances [3]. The barrel retains Thypoch's "Visifocus" depth-of-field scale, in which red dots open and close with the aperture setting rather than conventional engraved index lines [3]. The lens is built in Leica M mount and adapts readily to APS-C and full-frame mirrorless bodies for manual-focus use [1][2]. The focus ring includes a distinct click stop at the 0.7m position, marking the limit of the rangefinder-coupled range, with focusing able to continue to a closer minimum beyond it [3].

As a current-production lens introduced in 2025, the Simera 75mm has no established version history, special editions or collector variants yet. It shares optical engineering with Thypoch's Simera-C T1.5 cinema prime series [1].

Optical qualities

Rendering Reviewers characterize the Simera 75mm as a smooth, well-corrected portrait lens with strong subject separation and pleasant background blur [2][3]. Thypoch markets it for a rendering with gentle focus fall-off and a sense of depth, and independent testing largely supports that description [1][3].

Sharpness Testing found very good sharpness across the frame from f/1.4 at most distances, with the main weakness being corners at infinity; no meaningful focus shift was observed on stopping down [3].

Bokeh and transitions The bokeh is described as very pleasing, and in side-by-side comparison with the Voigtländer 75mm f/1.5 Nokton the Thypoch produced slightly stronger blur and, in some scenes, higher contrast attributed to its floating-element design, with smoother rendering of complex backgrounds at longer distances [3].

Distortion and vignetting Distortion is minimal, which the reviewer noted as useful for film shooters, while vignetting was rated about average and broadly comparable to other fast 75mm M-mount lenses, easing substantially by f/2.8 [3].

Flare resistance and aberrations Flare resistance, chromatic aberration correction and coma correction were each rated as average rather than standout, in line with the lens's price and class [3]. The aspherical element is well polished, with no visible onion-ring texture in out-of-focus highlights [3].

History

Development and Launch Thypoch announced the Simera 75mm f/1.4 ASPH. in early 2025 as the longest member of its Simera prime series for M-mount full-frame cameras, following the 28mm, 35mm and 50mm f/1.4 lenses [1][2]. The 75mm focal length and f/1.4 aperture positioned it as a fast portrait and medium-telephoto option, with the company emphasizing compact size, a 16-blade aperture and clean rendering [1][2].

Special editions No major factory special editions or limited variants of this lens are widely documented; it has been offered in a black finish, with silver shown in early press imagery [1][2].

Collector Notes Several published sources describe the Simera 75mm as a rangefinder-coupled lens with a focus range reaching about 0.6m, and review testing indicates the rangefinder-coupled range ends at a 0.7m click stop with closer focusing available beyond it; buyers should verify coupling behavior and the exact close-focus limit against the specifications recorded here before purchase [2][3]. Because the lens is current and inexpensive relative to vintage M glass, originality and conversion concerns common to older lenses do not apply. Worth confirming with any purchase are the bundled hood and caps, since the lens is supplied with a removable hood [3].

Sources

• [1] PetaPixel. Thypoch Simera 75mm f/1.4 Is a Shockingly Small Mid-Telephoto Prime. https://petapixel.com/2025/02/24/thypoch-simera-75mm-f-1-4-is-a-shockingly-small-mid-telephoto-prime/
• [2] Leica Rumors. Thypoch Simera 75mm f/1.4 ASPH lens for Leica M-mount review. https://leicarumors.com/2025/09/23/thypoch-simera-75mm-f-1-4-asph-lens-for-leica-m-mount-review.aspx/
• [3] Phillip Reeve (BastianK). Review: Thypoch Simera 75mm 1.4 - Their best lens yet?. https://phillipreeve.net/blog/review-thypoch-simera-75mm-1-4-their-best-lens-yet/