Asahi Pentax SMC-M dental 100mm F4 lens with Pentax AF080C Ring flash and Dental close-up set.

The set is very nice and complete and exist of the following parts:  SMC Pentax M  Dental Macro lens 100mm F4. An excellent lens by itself , the ring flash AF 080C with generator , the generator operates on 4 AA size batteries. And close-up lenses that attach to the flash with a magnetic holder that normally screws into 58mm filter thread on the front of the ring flash. This holds the lenses very securely in place and the system makes very rapid changes in the field possible.

Year of introduction: 1977

Mount : Pentax M  bayonet.

Optical construction:  5 elements in 3 groups.

Aperture range : f/4—f-32.  ( 6 blades )

Minimum focusing distance : 0,45m

Maximum Magnification : 0.5x

Filter diameter : 49mm

Size: 65x78mm

Weight : 360 gram.