The Silva ClinoMaster is a hand-held instrument for measuring vertical angles (aka clinometer). 

ClinoMaster Prismatic combines the traditional ClinoMaster features with a superbly clear and light-strong prismatic sighting system. Thanks to the construction it is extremely easy to obtain accurate readings even in dark conditions.

Ideal for taking strata dips for the field geologist.  An essential tool for mapping and exploration geology.  Also used in the forestry and satellite industries.

Made in Sweden.

For further information, please see: http://www.silva.se/products/proffessional/clinomaster