What is the difference between the 81000FA and the 81003FD?
The 81000FA is for adapting FC/PC style fiber optic connectors to either 815xxx or 816xxx optical heads. The 81003FD is for adapting FC/PC style fiber optic connectors to 816xxx optical heads only. The main difference is that the 81003FD consists of 2 permanently attached pieces, the 81624DD and the 81000FA. The 81003FD can thus be used with the 8162x optical heads, but NOT with the 81002FF integrating sphere and the other optical head accessories. The main advantage is that the 81003FD uses a magnetic ring allowing the user to switch very fast between different connectors. The direction of the connector is always the same when using the 81003FD (without adapter ring 81624DD) and 816xx optical head.
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