Added Lens Cap

Lens Cap/Lens Cap.scad

@@ -0,0 +1,30 @@
+/*
+ * Created by:
+ * Thomas Buck <xythobuz@xythobuz.de> in March 2016
+ *
+ * Licensed under the Creative Commons - Attribution license.
+ */
+
+// -----------------------------------------------------------
+
+$fn = 50;
+
+/*
+ * Depending on your printer and exact settings, you need to adjust
+ * this parameter. I've had a tight fit with 17.8mm for a 17mm lens.
+ */
+diameter = 17.8; // diameter of the lens
+
+width = 1; // wall thickness
+bottom_width = 1; // bottom wall thickness
+height = 6; // height of the whole lens cap
+
+// -----------------------------------------------------------
+
+difference() {
+    // whole part
+    cylinder(h = height, d = (diameter + (2 * width)));
+
+    translate([0, 0, bottom_width])
+        cylinder(h = height - bottom_width, d = diameter);
+}