Zoom is nice and free, focus seems a little tight - smooth, but certainly not binding.
Sirius MC Auto Zoom f:3.9 80-200mm 55mmDia Camera Lens, PK Mount
Sirius MC Auto Zoom 28-70mm f/3.5-4.5 Macro Lens M42 caps & sample images
SIRIUS MC AUTO ZOOM 28-200mm f4-5.6
Sirius MC Auto Zoom Lens 28-200mm for SLR Camera
Sirius MC Auto Zoom f/3.5-4.5 28-70mm (881930) - Working
Sirius MC Auto Zoom 1:4.0-5.8 f=28-200mm 72ø
