The User's Review: Lester A. Dine 105mm f/2.8 Macro 1:1 MC Lens with a 52mm filter thread and a P/K-A Mount

Originally, this Macro lens was purchased by Dr. SEC D.D.S in Salt Lake City, Utah, around later 1990s. The sticker on its barrel shows how to use it at various aperture sizes paired with a dedicated Dine Auto Macro Light. This info on the sticker is still useful at today's digital era.

This lens was well-built, produces high-quality images, and communicates with Pentax DSLR bodies (via the contacts on PKA lens mount, you may set the aperture via your DSLR cameras). Although the dedicated Dine macro flash is not of P-TTL, manual settings and a few test shoots will help you get wonderful macro images and wouldn't cost you much.