Arca-Swiss Lens board 110x110, flat, with Canon bayonet - Aperture Control
This Canon EF / EF-S bayonet lens board makes these lenses usable on the full range of 6x9cm cameras . It will remind the Fuji user of the classic operation of camera lenses, but here on his reflex.
The Arca-Swiss stage for Canon, with its electronic contact, makes it possible to impose a diaphragm from the outside (because there is no manual diaphragm adjustment ring on the lens) on the TSE optics . You connect the battery, numbers light up, you can adjust the diaf. If you disconnect the battery, the lens holds the diaf. In architecture, in current practice, the professional often also has his Canon camera as a backup and can do without the battery. It adjusts the last diaf known by its optics as long as it is mounted on its case. For example, he sets it to be 11, which is an excellent diaf for his entire architectural session with this lens. Then he mounts the optics on the adapter ring, the lens remains on 11.
The board allows good comfort in adjusting the apertures: The focal length of the lens and the aperture of the lens are displayed on a bright OLED screen integrated into the board. Two buttons on the lens board allow the aperture to be changed up or down in 1/3 increments. By pressing the two buttons at the same time, the lens can be placed in the fully open position or closes at the selected aperture (therefore we find the same device as in the large format cameras).It is therefore possible to use mirrorless cameras (that is to say having a good proximity of the sensor to the bayonet, which reduces vignetting due to the lens) with full format sensor mounted on the rear plane of the room . Lateral and vertical movements can thus be practiced on the rear plane, transporting the device into the image circle of the Canon lens.
Please note that Sony A7RII type cameras, because of the relief of their handles, will be mounted on Universalis chambers rather than on type R chambers; these are ideal for the Fuji GFXR for architectural photography.