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photo - whole telescope
Basic Info

Maker: Unknown


Year Range: 1670-1750

Year Notes:

Manufacturing Location:


Signature Notes:


No stand present.

Collection: Utrecht University Museum

Accession #: LI-46


Correspondence w/ museum curator.

Public Notes:

Objective lens (f = 492mm) and three lens erecting eyepiece of the type indicated by Huygens and Campani (three equal lenses). Cardboard tube consists of four parts, lens portion covered with a brown-colored textured paper. On brown dye are still-distinguishable characters, other three parts are coated with a smooth, almost parchment-like paper. Edges of horn rings fitted, also the lens is mounted in horn. The eyepiece consists of an inner and an outer tube. The outer tube is wooden mount with eyecup. In the inner tube are three equal lenses encased in wood rings. On the tube is indicated with ink the correct position, this appears to be true. Directly behind the objective lens (ø22.5mm) is an aperture of ø12.5mm.

Length (open):

Length (closed):


Exit pupil:

Object status:

Optical Basics

Objective type: unconfirmed

Optical style

Physical style

Functional style

Materials: wood, pasteboard, horn, paper, glass

Optical/Lab Data

Drawtube data:

Drawtube notes:

Objective Data