Unknown, 1700 c.
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photo - whole telescope
Basic Info

Maker: Unknown

Year: 1700 c.

Year Range: -

Year Notes:

Manufacturing Location:


Signature Notes:


No stand present.

Collection: National Maritime Museum

Accession #: NAV1555


Royal Museums Greenwich. "Flea-glass telescope". http://collections.rmg.co.uk/collections/objects/43767.html. [Accessed: June 2016].

Public Notes:

Museum Description: "This instrument, which is made of bone, unscrews into six parts which can be assembled into different optical instruments. It can be used as a telescope, but when the barrel is unscrewed a simple microscope, or flea-glass, is also revealed. Using this, a specimen stuck on the pin can be viewed through the small lens. The other accessories include a sun lens and a multiplying lens, which creates multiple images of the object viewed. This type of multi-purpose object was common around 1700" (Royal Museums Greenwich).


Caird Collection

Length (open): 132

Length (closed):


Exit pupil:

Object status:

Optical Basics

Objective type: N/A

Optical style

Physical style

Functional style flea glass

Materials: bone, glass, brass

Optical/Lab Data

Drawtube data:

Drawtube notes:

Diameter: 33 mm (max), 21 mm (min)

Objective Data