MusEYEum Online Catalogue

Welcome to the online catalogue of the British Optical Association Museum. Here you can search for both museum artifacts and archives. Data is transferred from our Collections Management System to this website on a regular basis.


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crossed cylinder confirmation test
crossed cylinder
20th c.
metal; glass
overall: 117 x 41 mm; lens diameter: 35 mm

Crossed cylinder. White metal rim and handle with textured grip. Round lens with red positive and white negative axis markings.


Ex Keeler Collection

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