Allow Leica M mount lenses used on Nikon DSLR camera body. * Compatible with Nikon camera includes: Nikon D3000, D300s, D3100, D3200, D3300, D3400, D3s, D3x, D4, D400, D4s, D5, D500, D5000, D5100, D5200, D5300, D5500, D5600, D5s, D6, D600, D610, D700, D7000, D7100, D7200, D750, D7500, D760, D800, D810, D810a, D850, D90 etc. * Made of brass and aluminum. Stable, precise and durable construction. Manually operated. Infinity focus not allowed. * For heavy medium format lenses, we suggest to use with a telephoto bracket and a tripod to balance its weight when shoot. * 30 Days No Reason Return, 12 months quality guarantee, 100% satisfaction assurance.