set of three no brand macro tubes close up

12mm 20mm 36mm adapter aperture background bayonet black blank camera circle close closeup collection copyspace depth detail digital dof equipment expose extension fixed focal focus frame gear hold imprint isolate isolated jzaring lens light long macro magnification magnify manual metal mirror nobrand photo photograph photographic photography pictures professional ring scale set shot shutter slr standard standing steel tall tele telelens tube turn tutorial white zoom