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OMAX Microscope Adapter for Nikon DSLR Camera$112.99
Specifications: Model: A14NK305 Material: metal Compatible with Nikon D-SLR cameras 23.2mm-30.5mm metal ocular tube adapter Tube depth: 36.0mm Packing List: 2X lens for microscopes, 42mm male thread Nikon DSLR adapter ring included, 42mm female thread 1 piece of 23.2--30.5mm metal ocular tube adapter