My Linhof Technorama 617s 90mm Schneider lens, Schneider centre ND graduated filter B&W UV filter.
It takes 120 roll film, you get 4 shots a roll. The 617 means 6cm wide and 17cm long picture frame. The centre graduated filter is needed because it shoots so wide you get light fall off on the sides, so the centre grad filter corrects this fall off of about 1.5 stops.
These cameras are used mainly for landscape work, usually stopped down to at least F22, F32, you get incredible depth of field, using ASA 50 film. Hard to capture any action as the shutter speeds are long, a tripod and cable release are usually needed, especially when shooting sunsets, sunrises.
It is considered a medium format camera.