lens system telescope sight culdoscope t-scope gun-sight
lens tube (the housing that holds the objective lens) a scope mount objective lens (most microscopes have one or more) a lens or lens housing a lens mount, which is the part of the camera containing the lens mount
lens housing with a mount for attaching to a camera adjustable ring for zooming and focusing sight on the top of the barrel an objective lens barrel shroud or flash suppressor
a telescope with the parts labeled
lens housing with a mount for attaching to a camera adjustable ring for zooming and focusing sight on the top of the barrel an objective lens barrel shroud or flash suppressor
binoculars which is a focus knob to adjust the image binocular which is an adjustable focus for each lens cameralens which has cylindrical shape binocular which has two lenses connected together binocular which is an eyepiece for each lens
binocular which is an adjustable focus for each lens binocular which has two lenses connected together binocular which is an eyepiece for each lens binocular which is a bridge between the two lenses binocular which is an adjustable diopter for each lens
monocular spotting scope theodolite binocular camera lens
binocular binoculars loupe magnifying glass coupler reflex camera
piston which is a combustion chamber in the center of the cylinder cylinder which is a circular cross section barrel which has round or cylindrical shape barrel which has openings for tapping or draining liquids piston which is a wrist pin that runs through the center of the cylinder to connect the piston to the crankshaft
binocular which has two lenses connected together binocular which is an adjustable diopter for each lens binocular which is a bridge between the two lenses binocular which is an adjustable eyecup for each lens binocular which is an adjustable focus for each lens