The 70-300mm G is very lightweight and has a broad zoom range. It has thirteen elements in nine groups. It takes 62mm filters. It is 4.6" (117mm) long by 2.9" (74mm) around and weighs 17 oz (480g). It focuses as close as 4.9 feet (1.5m), which is pretty good at 300mm. It takes the HB-26 hood which seems identical to the HB-15 hood of the 70-300 ED lens. It is also D compatible. It has a great nine-bladed diaphragm.