LEICA S with HC80mm

Review of using the HASSELBLAD HC80mm with the LEICA S typ 007.

Details of the HASSELBLAD HC80mm (hereafter referred to as HC80) are detailed in the link. Since the X2D-100C camera body is used in the linked site, the lens is used in manual focus mode, but when this lens is attached to a LEICA S via the LEICA S adapter H, it can be used in auto focus mode just like the HASSELBLAD H camera.
My impression of using the HC80mm with autofocus is that the focusing speed is slow compared to modern cameras, but the focusing accuracy is satisfactory as long as you use the LEICA S’s single central focus point and focus at the center. The camera will focus on all subjects except those without much contrast. The focus position changes when the lens is moved from the in-focus position to change the composition, so the photographer needs to compensate for this while looking through the viewfinder. It is not expected that the camera will be dexterous enough to focus on a desired location on its own, as is the case with the latest multi-focus point systems.
The focus surface is reasonably thin when the aperture is released at f/2.8, and it will take some practice to get the hang of it in order to focus on the desired location.

The camera weighs 1.3 kg, the lens 0.5 kg, and the LEICA H adapter C 0.3 kg, for a total weight of 2.1 kg, which is light for a medium-format lens.

The closest medium format lens to the HC80mm would be the PLANAR 80mm F2 for the CONTAX 645 or the PLANAR 80mm F2.8 of the C series.
The HC80mm and the Contax 645 PLANAR 80mm use a double-Gaussian lens construction, and their lens configurations are very similar, except for the position of the lens laminating surfaces, and the front group lens for the Contax 645 has a larger aperture for a half stop brighter maximum f-number. As of 2023, the price of the PLANAR 80mm F2 is about 300,000 yen, which is too high to afford.
The PLANAR C lens series is divided into two main types. The first PLANAR 80mm F2.8, called a 6-element lens, probably has the same configuration as the HC80mm, while the 7-element lens has a 5-group, 7-element configuration with 4 elements in the front group and 3 in the back group.