Rollei HFT Sonnar 40mm f/2.8

Rollei HFT Sonnar 40mm f/2.8

This small silver lens belongs to the early 2000s revival of screw-mount rangefinder gear, when Cosina produced bodies and optics for several brands. It carries Rollei's HFT (High Fidelity Transfer) coating designation and the classic Sonnar name, and it was the standard normal lens associated with the Rollei 35 RF. That camera, released in 2002, was a version of the Cosina Voigtländer Bessa R2 marketed by Rollei Fototechnic but manufactured by Cosina [1][2]. The Rollei 35 RF carried framelines for 40, 50, and 80 mm, with the 40 mm focal length treated as the camera's native lens, which is why a Rollei 40 mm lens was offered alongside it [1][3].

Optically the lens uses a compact five-element, four-group Sonnar-type arrangement with a maximum aperture of f/2.8 and a ten-blade diaphragm. It is a physically modest lens at roughly 30 mm long and 51 mm in diameter, weighing about 175 g, with a 39 mm filter thread and a minimum focusing distance of 0.7 m. The version recorded here uses the Leica thread mount (LTM, M39) and is rangefinder coupled, so it works on screw-mount bodies directly and on M-mount cameras such as the Rollei 35 RF and the related Bessa R2 by way of a standard thread-to-bayonet adapter [1][2]. It is not six-bit coded, which is consistent with its era and screw-mount construction.

The 40 mm focal length sits between the traditional 35 mm and 50 mm normals and pairs naturally with the Rollei 35 RF's 40 mm framelines [1]. Because the Cosina, Voigtländer, and Bessa names appear nowhere on the Rollei 35 RF, the camera and its lens were positioned as a distinct, more expensive Rollei product despite the shared Cosina origins, and the camera received relatively little fanfare at launch given its similarity to other contemporary Cosina rangefinder products [1][2].

Optical qualities

Rendering Detailed, independent published testing of this specific Rollei-branded 40 mm lens is limited in the reliable record. What can be stated factually is that it is a Sonnar-type design of five elements in four groups with Rollei's HFT multicoating, an optical class historically valued for good central contrast and a compact body. Beyond those design characteristics, specific claims about sharpness, bokeh, flare, distortion, or vignetting are not well documented in the sources reviewed here and are therefore not asserted.

History

Development and Launch The lens is tied to the Rollei 35 RF, released in 2002 as a Rollei-marketed version of the Cosina Voigtländer Bessa R2, built by Cosina rather than by Rollei itself [1][2]. Like the Bessa R2, the camera used a Leica M mount and a metal focal-plane shutter, and it was distinguished from the Bessa mainly by higher price, more prominent Rollei branding, a more silver appearance, and framelines for 40, 50, and 80 mm [1]. The 40 mm lens served as the camera's matching normal optic [1][3].

Special editions No widely documented military, export, or rare factory variants of this lens are established in the reliable sources reviewed. The lens is best understood as part of the short-lived Rollei 35 RF system rather than as a lens with a broad family of factory editions [1][2].

Collector Notes The most common point of confusion is naming and origin: the Rollei 35 RF and its lens were Cosina-made products sold under the Rollei name, with the Cosina, Voigtländer, and Bessa names deliberately absent from the body [1][2]. The camera and lens were treated without much fanfare at release due to their close relationship to other Cosina rangefinder products and their high price [1]. The verified record for this entry lists the lens in Leica thread mount; buyers should confirm whether a given example is screw mount or bayonet, since the companion Rollei 35 RF body itself uses an M mount and the two are commonly used together via adapter [1][2]. As with any small rangefinder lens of this period, verify smooth focusing and clean aperture operation, and confirm that the 39 mm filter thread, caps, and any hood are present and correct before purchase.

Sources

• [1] Wikipedia. Rollei 35 RF. https://en.wikipedia.org/wiki/Rollei_35_RF
• [2] Wikipedia. Bessa R2. https://en.wikipedia.org/wiki/Bessa_R2
• [3] Camerapedia. Rollei 35 RF. http://camerapedia.org/wiki/Rollei_35_RF