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Is this ring used for Infinity focus stop or for objective lens disassembly?[AN/PVS-18] : r/NightVision
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Adapter Ring Infinity Focus With Glass For M42 Lens To Nikon D3 D5 D90 D80 D500 D600 D800 D5000 D3000 D3100 D7200 Camera - Lens Adapter - AliExpress
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Fotga Adapter Ring Infinity Focus For Konica Ar Mount Lens To Canon Eos M M2 M3 Mirrorless Camera - Lens Adapter - AliExpress
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