Ross – Zeiss Convertible Anastigmat Casket set 18×24 cm It is composed of a barrell and three cells:
cell 19 1/4″ 480 mm. cell 16 1/2″410mm. and cell 14″ 355 mm. for a total of four combinations
260, 230, 220, 200 mm. and three single cell 480, 410, 355 to cover 18×24 cm. and more . Angles of coverage started at 69°
