Dollond

From Camerapedia.org

British companies
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Dollond was a UK-based optical and mathematical instrument company, founded in 1750 in London by John Dollond (1706-1761) and his son Peter (1730-1820). John Dollond invented one of the first achromatic lenses - patented in 1758 (if not The First, although Optician George Bass seems to have made achromats, perhaps from 1729^[1]). This lens was used for the first achromatic telescope; the Dollonds went on to make several more inventions in achromatic lenses, telescopes and heliometers. Peter's nephew George Dollond (1774-1852) took over the company in 1819.

Dollond's had sold Camera Lucidae and Camera Obscuras in the 18th and 19th Century, and sold film cameras in the early 20th.