Optical Lenses Focal Length - Optical Lens Focal - Optical Lens Focal Featured Recommendations:

Wireless: Long Focal 8x Optical Zoom Telescope Lens for Apple iPhone 4 4G Black (Include Universal Holder, Mini Tripod, Cleaning cloth, Black Bag and Case) - BrainyTrade

BISS: Donegan DA-7 OptiVisor Headband Magnifier, 2.75x Magnification, 6" Focal Length - Donegan Optical

BISS: Donegan LP 5 Replacement Lens for Opti-Visor, 2.5x Magnification, 5 Diopers, 8" Focal Length - Donegan Optical

Wireless: Neewer? Telescope 8X Zoom Telephoto Long Focal Camera Lens Tripod for iPhone 4 4S, Includes Universal Holder, Mini Tripod, Cleaning cloth and Case (White) - Neewer

Photography: Autek ZnSe Focal Lens for CO2 Laser Cutting Engraving Diam 20mm FL 76.2MM(FoL_ZnSe_D20_FL76) - Autek

BISS: Donegan LP 10 Replacement Lens for Opti-Visor, 3.5X Magnification, 10 Diopers, 4" Focal Length - Donegan Optical

Single Detail Page Misc: Brand new 8x Optical Zoom Telescope Focal Lens with Tripod Attachment for iPhone - FlashingBoards

BISS: V980-10 Flashlight Magnifier with Lens, 10x Magnification, 30mm Focal Length - DONEGAN OPTICAL

Wireless: Mango Natural 12x Zoom Telescope Camera Lens Kit + Tripod + Case for Apple Iphone 5 5G - Mango Natural

Book: Applied Photographic Optics: Lenses and Optical Systems for Photography, Film, Video and Electronic Imaging - Focal Pr

Photography: Pixco Focal Reducer Speed Booster Lens Adapter For Canon EOS EF to Sony E Mount With Optical Glass NEX-7/NEX-6/NEX-5R/NEX-5N NEX-5C/NEX-F3/NEX-5 - Pixco

BISS: American Educational 7-909-6 Unmounted Double Convex Lenses with Ground Edges, 75mm Diameter, 17.5cm Focal Length (Bundle of 5) - American Educational

Single Detail Page Misc: 30x Foldaway Eye Loupe Gemstone Jewelry Magnifier with LED Light - Amico

BISS: American Educational Unmounted Double-Convex Lens with Ground Edges, 38mm Diameter, 5cm Focal Length (Bundle of 5) - American Educational

Sports: Carson Pro Series MagniVisor Deluxe Head-Worn LED Lighted Magnifier with 4 Different Lenses (1.5x, 2x, 2.5x, 3x) (CP-60) - Carson Optical

Wireless: Neewer Telescope 8X Zoom Telephoto Long Focal Camera Lens Tripod for iPhone 4 4S, Includes Universal Holder, Mini Tripod, Cleaning cloth and Case (Black) - Neewer

BISS: Donegan LP 4 Replacement Lens For Opti-Visor, 2x Magnification, 4 Diopers, 10" Focal Length - Donegan Optical

Apparel: New Lightweight Bifocal Plastic Frame Reading Sunglasses / Sunreader. 31128ABF-+1.50(CL BN / CL BN TEMPLES)

Sports: Carson MagniView 2x Power Magnifier with 4.5x Bi-Focal Spot Lens (OD-36) - Carson Optical

Health and Beauty: OPTX 20/20 Stick-On Bifocals, 1.50 - OPTX 20/20

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