Established in 1995, Guanghi Optical Instrument Co., Ltd. is a joint stock China folding opera glasses manufactuer and designer engaged in the manufacturing and marketing of a wide variety of Optical Instrument and products. Our products are widely applied in the education of students, research in lab, entertainment and science explore. During more than one decade's development, our products have awarded the CE certificate. We also have our own quality control system and customer' service system. So we can accept the order against customers' samples, specifying designs, specifications, and packaging requirements. We also prepared to accept the OEM and custom folding opera glasses with customer's own trade marks or brand names.

Opera Glasses 3x28 Black 3x magnification. Pocket-sized opera glasses are convenient for comfortable viewing of concerts and operas. Extremely light weight for extended hand holding. Fold flat for easy storage. Weight: 1.9 oz / 53 grams. Exquisite opera glasses made by LaScala Optics are available in many configurations and colors. Lightweight and compact, they are very easy to carry in a small purse. 3x magnification of the clear and bright lenses makes for a very comfortable viewing even under dim lighting conditions. Ideal for theaters, concerts, arenas and multitude of other occasions where the observer is distanced from the subject of interest. If you are an eyeglass wearer, you won't have to fumble removing and replacing your glasses due to the generous eye relief and large 12 mm eyepiece lenses that allow you to wear your normal prescription eyeglasses simultaneously. Oval eyes compensated in part for the limited visual field provided by round opera glasses. They were also better for users with a wide inter-pupillary distance since, unlike field glasses, very few antique opera glasses had folding bridges adjustable for p.d.

Twentieth century theatre glasses were usually of cheap plastic. Whilst playgoers could buy their own it was more usual to hire them from a dispensing unit on the back of the seat in front. The first picture shows a pair of 'Tivoli'' opera glasses by the well-known firm of Kershaw. (PAT. No 410292). In the twentieth century 'skeleton' pairs were also popular on account of their light weight and portability. We show a pair of folding opera glasses in nickel silver (?) with a lever-driven sliding action. The objective lenses screw in, whilst the eyepieces have eye-shaped cups - a thoughtful touch. This is a French example, marked 'Archimede'. Oval eyes compensated in part for the limited visual field provided by round opera glasses. They were also better for users with a wide inter-pupillary distance since, unlike field glasses, very few antique opera glasses had folding bridges adjustable for p.d. The oval-eyed opera glasses pictured with ivory barrels date from the early 20th century and bear the name of H. Oltzappfel & Co of 64 Charing Cross, Opticians to the Prince of Wales.

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