21 millimeters

Specifications:20-140x, Field of View (ft@1000yds/m@1000m) =54/18@20x, Prism Glass: BAK-4, Exit Pupil (mm): 4.0, Close Focus (ft/m) 87/29, Eye Relief 21mm  more

Looking for big zoom in a small package? The UCF Zoom binocular series stands alone. These rugged binoculars offer extraordinary power in a compact and rugged ...  more

FREE BONUS w/PURCHASE! Celestron Ultima 65 2.6"/65mm Spotting Scope Kit Ultima 65 2.6"/65mm Spotting Scope Kit, Waterproof, Straight Viewing, 18-55x Zoom ...  more

Pentax Binoculars UCF Zoom II 8-16x21 Compact Porro Prism Binocular 62217. Pentax UCF Zoom II 8-16x21 Compact Porro Prism Binocular 62217  more

With 110 deg., the Ethos-SX has 21% more AFOV area than the 100 deg. Ethos design. This permits 62% power increase from a 6mm Ethos, while retaining 68% of its ...  more

8-16 x 21 UCF Binoculars w/cas  more

Minox LER Vario 21-42x Long Eye Relief Zoom Spotting Scope Eyepiece LER Vario 21-42x Long Eye Relief Zoom Spotting Scope Eyepiece, Waterproof & Fogproof, ...  more

Minox offers a variety of fixed and zoom eyepieces to work with its 62 mm spotting scope. This 21-42x zoom eyepiece offers you a variety of magnifications for ...  more

Bushnell Powerview binoculars offer contemporary styling and design with traditional Bushnell quality and durability. A variety of styles and features appeal to a ...  more

Celestron(r)'s Ultima Refractor 65 Straight View spotting scope is more versatile than ever and now waterproof. Featuring multi-coated optics to provide extra ...  more

They are small in size but give you extraordinary power and a convenient slide zoom. A magnification range ofr 10 to 30X will bring the action closer to you.. The ...  more

Minox 21-42X LER Vario Ocular - Zoom Eyepiece for Minox MD 62 / MD62 ED Spotting Scopes - 62303  more

[Pre Order - allow extra time] Vixen Optics Geoma II 82-A Spotting Scope Geoma II 82-A Spotting Scope, Angled Viewing, 21-63 Zoom Eyepiece, 82mm Objective, Fully ...  more

The Bushnell(r) Powerview(r) Series of binoculars offers you compact, streamlined designs for bright, crisp views of wherever you're exploring.  more

BackTrack D-TOUR - GreenLong after your cell service has faded the Bushnell BackTrack D-TOUR has you covered. With up to five storable locations the D-TOUR allows ...  more

Specifications:20-140x, Field of View (ft@1000yds/m@1000m) =54/18@20x, Prism Glass: BAK-4, Exit Pupil (mm): 4.0, Close Focus (ft/m) 87/29, Eye Relief 21mm  more

With Tasco'sr Play by Play AM/FM radio binoculars you won't miss a minute of the action while watching your favorite sporting event.  You can zoom in on the ...  more