Soligor Daffodils

Canon EOS 30D with an old Soligor C/D 28mm Wide-Auto f/2.8 lens via an M42 adapter.

Like Vivitar, Soligor did not manufacture lenses. Instead they specified the optical configuration they wanted and invited bids from Japanese lens makers. This particular lens was to the premium C/D ('computer designed') standard and was made by Sun in 1980 (you can tell this by its serial number). Within a few years the market for M42 screw thread lenses had declined as third party suppliers like Soligor followed the bayonet lens standard.