This is a late version of the Leudi, the revolving plastic sleeve has been replaced by a dial. In use the least visible number is observed in the usual way. The subject, shown by one or more coloured dots, is aligned with the 'least visible' number printed on the casing by rotating the dial. The shutter and aperture pairs can then be read. A second dial on the back of the meter alters the film speed setting. The subject is indicated by coloured dots: yellow white blue = sunlit distant landscape; yellow white = outdoors in sunshine; w = shadow or no sunshine; white blue = interior with light walls; blue = interior dark walls. Made in Austria.

This is one of the simplest extinction meters and, reportedly, quite accurate. In early models the number just visible in the 'finder' is aligned with a box depicting the light conditions and subject. The shutter speed and aperture pairs can then be read. This was accurate for one film speed only. If a different speed was used adjustment was made after lining up the subject box and number. On later models a table gave an index for the film speed this was combined with the light value number e.g. index = C, number = 8, gives C8 which is then aligned with the subject box. The drawings in the subject boxes differ between examples. The price was 5/- in 1939. A cine model was also produced c. 1936.

The patent for the meter is in the name of Alois Leber of Austria.

This American meter operates in a similar way to the Leudi but the reading is taken looking down into the meter, a table on the back of the meter shows the shutter and aperture combinations. A very similar meter was produced in Germany under the name of Lumy.

An index is set against the emulsion speed, shown as 1.5 - 200. A window in the meter displays a range of letters A - H, the least distinct corresponds to the light value. On the front of the meter a dial showing the sky conditions, or artificial light, is set against the A - H value. The shutter speed / aperture pairs can then be read. A table in the instructions shows the speed of various plates.

The least distinct number is noted when looking through the meter, a transparent plastic sleeve is moved to align with the number, the shutter speed and aperture pairs can then be read in the column depicting the type of scene. The meter is marked 'System Heinz Kilfitt' who was the designer of the meter.

The least distinct of a set of numbers (which are aperture values) is noted when looking through the meter, this is set on the face of the meter against the film speed, the shutter and aperture pairs can then be read. There are three scales of shutter speed for different light conditions, sun, dull and indoors. The meter is used at waist level, a flap covers the light-scale when not in use.

The US patent is in the name of Bing.