Custom made reversing extension tube for using Componon S 135mm lens on Bellows.
Inner thread is M42 for rear thread of Copmponon S
Outer male M49 thread fits the front filter thread of the lens when reversed.
Additional extension provided for more magnification on bellows since lens focuses to
infinity about 35mm beyond front of bellows when fully retracted.
Grooved ring allows Minolta ringflash to be mounted for lighting.