Soligor was originally the trade mark for the American Allied Impex Corporation, used from 1956 for lenses and later cameras imported from Japan.

Phototechnik GmbH by Allied Impex Corporation (USA), the company changed its official name in 1993 to match the brand name used on its optical products.

Most commonly encountered products were manufactured in Japan (to quite a reasonable standard-many by Tokina) under the Soligor brand, as well as Miranda (which was acquired by Allied Impex in the 1960s).

The company also seems to have had an association with Vivitar (the T4 interchangeable mount, for instance).

Most famously associated with Soligor, designed in the 1960s (apparently by Tokina), the T4 mount was intended to compete with Tamron's T-thread, and the later Adapt-A-Matic mounts.