FSA-1 means Field Scope Adaptor, model 1 in Photography
Similar to FSA-1
FSA-1 - Field Scope Adaptor, model 1 FSA-2 - Field Scope Adaptor, model 2 FSE - Film Speed Equivalent FTMF - Full Time Manual Focus FZY - Fuzzy GSP - Gelatin Silver Print HLCF - Holographic Light Control Film