Introduction: M42 Lens to Nikon mount AI F adapter ring D70s D90 D3100 D100 D7000 D300 D700 D4 The ring allows M42 lenses (Carl Zeiss, Pentax, Praktica, Mamiya) to be used on Nikon F mount cameras (film SLR and digital SLR) Main Features: It is possible to use Macro rings and other accessories Brand new, never used Made of metal - Anodized Aluminium Colour : Black Only for MACRO photography; unable to focus infinity .
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