1) About macro photography or shooting negative film
2) Lock the knob and slide the side knob
3) Sideways scale, more precise movement
4) Activity range: 6.3 inches (16 cm)
5) Precise positioning with lung cells and fine bottom. Standard January 4th screw hole bottom can be screwed into a tripod or head for direct use
6) Size: 6.3 x 3.7 x 0.6 inches (16 x 9.5 x 1.5 cm).
7) Material: Metal