Example tags/facts

Three Carl Zeiss orthoscopic eyepieces

Eyepieces (3), for 35mm diameter telescope, metal / glass, made by Carl Zeiss, Jena Germany, 1890-1920, used at Sydney Observatory, Australia Three orthoscopic eyepieces for a telescope tube 35mm in diameter. Each eyepiece can be unscrewed into four pieces, a metal tube, two lenses and an aperture. They each have different focal lengths, 18mm, 12.5mm and 9mm.

View object on the British Library on Flickr Commons site (opens in new window).

(Accession num: H10289)

So far people have added content in 6 turns about this object.


trio, lenses, eyepiece, telescope, eyes, metal, glass, optics, three, zeiss, carl, optical, vision, scale, eyepiece, lense, eye, orthoscopic, ziess eye piece, eye scope, viewing piece, mircoscope

You can also view a list of objects with added facts (not just tags).

  • Your score for this game:

    • No points for this game yet. Start playing to earn points
    Login or register to save your points
  • Objects you've played in this game

    So far players like you have improved 980 records for 3 museums and libraries through games on this site.
  • Top registered players (all games)

    • Han (5620 points)
    • Josie (5000 points)
    • lrnc (4400 points)
    • mia (4005 points)
    • Hepburn (2190 points)
    • ad (1785 points)
    • archiwicz (1225 points)
    • miathepink (1115 points)
    • JoK (890 points)
    • jennifuchs (870 points)
  • Register or login to save your points

  • Help the British Library tag a million images

    Some of the million images the British Library have released on Flickr Commons have been added here for you to play with. The tags you add will help people find these historic images.

    They have asked people to use these special tags where appropriate: 'map', 'letter'+theletter e.g. LetterA, 'architecture', 'decoration', 'landscape', 'music', 'portrait', 'fashion'. If the image needs rotating, add 'rotatec' or 'rotatecounterc'.

    More information on British Library tagging guidelines

  • Coming soon – top recent players

    I want to celebrate people who've just started playing so I'll add a widget to show off the latest contributions.