Photos 9 were taken from a distance of 1.8-2 meters (6-7 feet) with apertures 2,8.
Photos 10 were taken from a distance of 1.8-2 meters (6-7 feet) with apertures 5,6.
Photos 11 were taken from a distance of 1.8-2 meters (6-7 feet) with apertures 16.
Technical information:
Lens Mount: M42
Focal Length: 37mm
Aperture: 1: 2.8
Aperture range: 2.8-16
Aperture: 10 aperture blades, Manual
Focus range from 0.7m to 20m to infinity
The filter holder: M49x0.75