Sentence:  “Never mind that,” the Hunter put his hand on the barrel of the <WSD>farseer</WSD>. “Look now.” Damien lowered his eye to the viewpiece—and saw the ... Magnified exactly as it had been, with the <WSD>farseer</WSD> still fixed on the features he had chosen. 
Meaning of the word marked with <WSD> tags:  An instrument or tool used to farsee; scope