Marshall, John, 1700 c.+25
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Photo

photo - whole telescope
Basic Info

Maker: Marshall, John

Year: 1700 c.+25

Year Range: -

Year Notes:

Manufacturing Location: England

Signature: J MARSHALL

Signature Notes:

Inscriptions:

No stand present.

Collection: Coll. Willach

Accession #: 49

Sources:

Project investigation

Public Notes:

Not reverse taper. Sharkskin cover. Tooling changes c. 1700, "open". After 1700 tooling pattern is triangle-rectangle-triangle. Marshall optics comparable to Campani. Yarwell's not as sharp. Both made microscope as well. Yarwell microscopes are rarer but his telescopes more common.

Length (open):

Length (closed):

F-ratio:

Exit pupil:

Object status:

Optical Basics

Objective type: unconfirmed

Optical style

Physical style

Functional style

Materials: glass, gold tooling, sharkskin, pasteboard, wood

Optical/Lab Data

Drawtube data:

Drawtube notes:

Objective Data

Eyepieces

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