Rare Lens

人肉接環試鏡片

 

 

 

 

 

 

 

 

An unnamed manufacturer, although the barrel bears the inscription 'B.A.F.  L.F.D.  50' and with the s/n: 200027.  Also included is '50', which I assume is a reference to the focal length of 50mm.  Assuming that this is correct, then the lens has only one speed, namely wide open, at f2