Camera lens is not installed
With the manufacturers no difference, as long as the positioning point at the fuselage positioning point, rotate, hear or feel click on the click
This is a D-type mirror with an aperture ring. Before installation, set the aperture ring to the minimum aperture position and lock it. Then place the mark point into the camera bayonet. Press the lens lock button to rotate the lens counterclockwise by about 45 degrees. "Click it" sound.
You put the lens aperture ring to the minimum aperture f22 on the line. This lens is very good price, quality is good, nothing special