Overall this is very good lens for taking small object for the detail... One really bad about is, this is too close lens that you need to focus through moving your camera back and forth.. Very light weight and can use X2 Extention...
X1 to X5..; Very detail colse up!! f/2.8 bright lens!! light weight..; Can use X2 Extention..
Manual Focus, you need to move front and back..; when you use X5, you might thing about distance becuase lens is moving out..