Its use as a telemeter is slightly different: the finder is levelled by ensuring the horizontal frame aligns with the centre line of the lens, the base of the subject is then observed against the distance scale engraved on the lens. The drawing of the second version shows the pointer to be suspended from the top of the rear section rather than the bottom. There were two slightly different versions, the first (the example shown here) is depicted in the British Journal Almanac of 1908, in the 1912 issue it is described as 'improved' and that a patent has been applied for. The finder was supplied with three masks to fit behind the lens for different angles of view, a mirror for use at waist-level could be attached behind the pointer. To use as a telemeter the finder is tilted downwards so that the pointer aligns with the centre line on the lens and the base of the subject, the horizontal frame will then point to a value on the distance scale engraved on the lens above the centre line.
The finder is levelled by aligning the edge of the horizontal frame with a centre line engraved on the lens.
This is a conventional direct-vision finder with a single negative lens and alignment post, at the rear of the finder a frame is hinged so that it remains vertical when the finder is tilted, to this frame a second frame is attached that will remain horizontal.