副廠鏡頭品牌關於「SIGMA tw」標籤，搜尋引擎有相關的訊息討論：
SIGMA台灣總代理恆伸照相器材有限公司www.sigma.net.twBRAND ® wash head for wash bottles, LDPE - Sigma-Aldrichwww.sigmaaldrich.com › catalog › product › sigmaEppendorf® Bottle Thread Adapter from GL 45 to GL 38, ETFEwww.sigmaaldrich.com › product › sigmaBRAND® screw cap thread for GL W 45 - Sigm