Only one Soligor : I did buy one last month to use it on Pentax-k mount monocular convertor: the pentax- k mount based Soligor 70-300mm f3.8-5.6 MC C/D.
see
PENTAX Monocular Converter K reviews - Pentax Camera Accessory Review Database
Because it is a single ring focus&zoom, going up to 300mm (210mm is more common in other brands) and was budget friendly...
It works very well as monocular, the point and zoom is very convenient in this setup, image looks good.
On camera K3-II it can produce nice images, but not as sharp as more modern lenses - not good for severe cropping.
The 1:3 macro in 2nd image is also quite ok, but if feels like dof is lacking a bit when compared to other lenses. Bokeh is quite pleasing.
Exif : note that the manual set focal length is 250 mm (as an approximation for the zoom lens), the camera did not get focal length info. images were taken in 200-300mm range.