what is an eye prism

... for Robotic Total Station Model: TB360 Specifications: Constant: 2mm Angle Accuracy: ≤5" Size: 25.4mm Target Range:400m Fea...

Rubber Cup Black 12x32 Compact Roof Binoculars Telescope For Adults Model 1303G Magnification 12x Object Diameter 32mm Field of View 87m/100...

Relief 13mm 8x30mm Porro Binoculars 8x Magnifying Mirror 8x30mm Porro Binoculars 8x Magnification 30mm Objective Apparent Field of Vie...

... Product Features 1. FMC optics design & porro Bak4 - ideal for kids. 2. Lightweight & Compact design - easy to use. 3. Coated rubber ex...

... Lightweight Small Binoculars For Birding Parameters for 8x25 10x25 Binoculars Magnification:8x Magnification:10x Objective diameter(mm):25 Ob...

... Relief 15.3mm 15.3mm Product Size 12.5x7.5x13.5cm 12.5x7.5x13.5cm Weight 645g 645g Coating FMC FMC Features: 1. Unmatched Clarity and Durabili...

... 7x50mm Waterproof Floating BinocularX50mm waterproof high definition binoculars for tourism hunting Product Description Parameters of 7X50mm ...

... Parameter: General Specifications Type 7x40 Power 7x Close Focus 1.5m Field of View 113m@1000m Exit Pupil Dia. 4.2mm Relief 16mm Optical ...

...View 28-14 Angle of View 2.2-1.0° relief 13-11mm Exit pupil 2.9-0.95 near focus 20mm High-Definition Optics: Experience unparalleled clar...

...(Real): 3.0° F.O.V.(ft/1000yds): 339ft Angular field of view(Apparent):36° Exit pupil: 5.8mm relief: 18mm Close focus: 15m Relative Brightness:...

... watching Feature Adjust pupil:58-73mm Best Mgnification and Comfortable This product has a superb maginifcation of 10X with 5 pieces and 3 gro...

... 800m Total station for Surveying Instrument Features 0.8 mega pixel camera on top of the EDM on RTS-862I,capturing the color images of the po...

3X Tactical Air Gun Weapons with Flip Up Lens Cover Set Circle Dot Hunting Airsoft Accessories Product Description: Magnification: 3x Reticle: C...

... lens is made of precisely grinded superior optical glass. Newly designed optical , no corneal reflex, and even lightening makes clear ophthal...

... bag - inner carton box - Delivery outer box Advantage: 1. 3d fireworks glasses multi-starbursts of 3d color these -...

...h Rotating , panneaux trivision The surface of a Tri-Vision Billboard is divided into vertical strips. Each strip has three sides which rotat...

... 800m Total station for Surveying Instrument Features 0.8 mega pixel camera on top of the EDM on RTS-862I,capturing the color images of the po...

.... Diameter 32mm Brightness Control Red : 3 levels / Green : 3 levels / Blue : 3 levels Reticle Type Bullet Drop Compensator Relief 2 - 3.5" Fil...

...Gold Brand Serpenti Earrings in 18K White Gold set with Emerald and with pavé diamonds Snake Head Description: Diamonds are graded by color. A...

Sharpy Beam Moving Head Rotating 230W 7R With Focus For Pubs Quick Detail: 1. Sharpy 7r beam light. 2. Static gobos and color wheel is available. 3. 8...