These RSPB Puffin binoculars offer great value, they are a good entry level, high-quality binocular. The optics definately out perform the price. Supplied with a case and strap, a handy bird identification guide and a FREE pin badge. Suitable for adults and older children. One year guarantee. Puffin 8 x 32 specifications Magnification 8x; Lens diameter (mm) 32; Exit pupil (mm) 4; Eye relief (mm) 13.6; Field of view (degrees) 7.5; Close focus (m) 2.5; Height (mm) 112; Width (mm) 115; Weight (g) 500