Filters and Lens Accessories
The Bolex Matte Box was introduced in 1962 and can be used with any H camera. However, the through-the-lens viewing of REX cameras was recommended.  It allowed the cinematographer to produce different effects with masks, and also served as a filter holder and lens shade. The device was attached to a removeable flat base. Later model H cameras with the built-in flat base were designed to easily accept the matte box without the accessory base. The unit was supplied with keyhole, binocular and heart shaped masks, blank masks, acetate sheets, and front and rear frame glassplates. Two versions were available: One for use with zoom lenses (bottom left) and the other for focal length lenses up to 26mm (bottom right).
1 Ernst Wildi, "The Matte Box," Bolex Reporter, Vol. 13, No. 1, 1963, 29.
Lens and Accessory Support
This Bolex accessory served multiple purposes: as a device to support heavy lenses; to allow the Bolex matte box to be used in front of long telephoto lenses; as a stand for macro filming, and as a portable titling unit. It consisted of a 20" long optical bench, with 12" and 27 1/2" extension rods, an adjustable lens support with lock for lenses up to 4" in diameter, and a titling frame. This unit appears to have been first available in 1964.
Bellows Extension Unit
(1967) The Bellows Extension unit was intended for H-16 cameras with reflex viewing and allowed continuous focusing from 4 1/2" to infinity. The unit was attached to the camera by using two built-in turret screws. It was equipped with a geared focus knob, pre-set diaphragm lever and 5" long optical bench engraved with distance and exposure indicators. A special 75mm Yvar lens was included, as well as two adapter rings; one for use with C mount telephoto lenses, and the other for the Switar 25mm lens.