privateer As shown in the figure, here we need to use the M48-M48 16.5mm extension tube and the M54-M48-2 adapter ring, the latter of which comes in the packaging of the 2-inch filter wheel, and there is also no need to remove the camera target plane adjustment ring. When connecting the filter wheel and the camera, we need to first disassemble the front and rear covers of the filter wheel, and then connect them through the screw holes