Give 6X magnification compared to normal lens, with excellent resolution, contrast and corrections, even at maximum aperture.
	Nikon F, speed 1/500, 300mm f:4.5 at f:11, ASA64

S p e c i f i c a t i o n s Lens Contraction 6 elements, 5 groups Angular Field 8 degrees 10’ Minimum Focus 4m (13 ft) Diaphragm action Fully automatic F-stop scale f:4.5-5.6-8-11-16-22 Filter Size 72mm screw-in type Lens hood Built-in telescopic type Weight 1.1Kg (2.3lbs) Lens size 80X203mm(3-5/32X8 in) Lens case CL-20 Lens cap 72mm, snap/screw type