The Blendux was for cine use, the Ombrux, was for still photography. The Blendux is simple to use, a needle indicates the aperture required for a set film speed and f.p.s. value (16 f.p.s. with a shutter speed of 1/32). Tables are used for other films, shutter speeds and f.p.s. The price was £4.4.0. The Ombrux is similar to the cine version, a needle moves over a dial and shows the shutter speed for a set aperture and film speed, tables are consulted for other film speeds and apertures. The meters are dual range, pressing a button on the face of the meter activates the more sensitive scale.

The Cimbrux was for cine use, similar to the Blendux.

The needle moves over a scale of shutter speeds that is connected to an aperture scale. In use the reading is taken and as the needle moves across the shutter speed scale the aperture ring can be turned to bring the required setting into a window. Alternatively the aperture is set first and the shutter speed is read when taking the reading. the price was £5.5.0.

In use a dial is turned until a needle matches an index seen in the finder. The shutter speed / aperture pairs can then be read. In low light the needle can be matched to one of a series of values a multiplication table is then used to give the correct reading. Some versions of the meter do not have the DIN scale, others have only DIN. The meter was also known for a short while as the Helicon, that name was later used for a combined meter and rangefinder. Some versions have a baffle over the sensitive cell. Available with a foot to fit the accessory shoe of a camera.