31. The lens mount release and frameline preview lever are located on the front of the camera. 32. The Pentax K ( bayonet ) lens mount . 33. Legacy lenses for the M39 lens mount , Nikon S-mount and M42 lens mount have been discontinued. 34. Lens adapters are generally easier to make when the camera body has a large lens mount . 35. It has a Canon FL lens mount compatible with the large range of FL series lenses. 36. The shutter speed dial surrounds the lens mount . 37. M42 lens mount variants of the RTL line of cameras also appeared under the Practica name. 38. The most common interchangeable lens mounts on the market today include the Canon E digital-only mount. 39. At the heart of the system is the FD lens mount , which mainly supported only manual-focus lenses. 40. The Pentax became so dominant that the 42 mm screw lens mount used so successfully until then.
