Features: 1.Which allows more light to enter the telescope. so you will get the best view on your outdoor adventures. 2.They can provide more light for the monoculars, reduces chromatic aberration and shadow, give you a clear and bright vision. Material:plastic Color:black Size:as shown Magnification: 8 times Eyepiece diameter: 14mm Objective lens diameter: 20mm Exit pupil distance: 12.5-9 m Package includes:1*Spotting telescope Note: Please allow minor error due to manual measurement. The colors may be a little difference for the different monitor display.