Hi mates, i have a Kern-Vario Switar 12.5-100 f2 PTL with Auto zoom and exposure, i need to know that is it possible to use this lens manually on a dslr.? by mounting.? and also i need some instruction manual for this lens, the aperture seems to be weird, 2 blades, and also not moving, as i dont have the battery inside the lens, so kindly someone guide me some basics about this lens and also if there is some proper manual then it will e a great help.
Thanks