Maker

OMNI Optical Products Inc., USA

Model

OMNI JR 25.4 Prism Assembly

Serial Number

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Dimensions

57 x 42 x 122 mm

Image

Description

This small prism (25.4 mm diameter aperture) is designed for short range applications. In its metal yoke, it can be handheld or mounted on a reflector pole (5/8 inch thread). The orange metal yoke carries a spot bubble.

If the prism is mounted on the U-shaped plastic holder, it can be attached to the string of a plumb-bob.

In both cases, the prism can be mounted in a '30 mm (prism) offset' or a 'zero mm (prism) offset' position.

The prism can also be used 'free hand' without any attachment.

The various user options are explained in the above diagrams.

The equipment comes with a canvas pouch (16 x 12 x 7 cm) and with and instruction sheet.

History & comments

.

Conservation

in canvas pouch (120 x 160 x 70 mm)

Condition

good

Remarks

Donated by Bill Rein, Surveyor, Balgowlah NSW, April 2012

Dates

Catalogued by J. M. Rüeger on 15.6.2015. Photos by J. M. Rüeger.