Simple Periscope Constructing Kit簡單望遠鏡製造套件
只共有２枚凸透鏡，望遠鏡由兩支小紙管砌成，可自由前後伸縮以達至更佳的對照效果，望遠鏡倍率可達5倍, 製作簡單容易 Objective 45 mm dia. f=220mm Eyepiece 30mm dia. f=44mm 望遠鏡直徑 45mm
DIY kit with 2 convex lens, 2 set of periscope tube, Objective 45 mm dia. f=220mm Eyepiece 30mm dia. f=44mm diameter of periscope : 45mm
Item no : JP 115-465