Dioptrice : pre-1775 refracting telescopes

pre-1775 refracting telescopes

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Patroni, Pietro, 1720 c.
Adler Planetarium and Astronomy Museum

Photo

photo - whole telescope

Basic Info

Maker: Patroni, Pietro

Year: 1720 c.

Year Range: 1714-1722

Year Notes:

Manufacturing Location: Italy

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: Adler Planetarium and Astronomy Museum

Accession #: M-460

Sources:

Project investigation and collection website

Public Notes:

Presumably Italian made telescope. It appears that Black sharkskin coversthe main tube without tooling. Five draw tubes covered with gold-tooled green vellum, badly soiled in several places. Ivory eyepiece mounting. Tube containing lenses 1 and 2 in the eyepiece is reversible. With "grande" side out, the data is as given under eyepiece 1. With the "chiaro" side out data is given under eyepiece 2, and the combination focal length is 55.9 mm and M = 9.1.

Length (open): 1060

Length (closed): 320

F-ratio:

Exit pupil:

Object status:

Optical Basics

Objective type: singlet

Optical style

Physical style spyglass

Functional style

Materials: glass, sharkskin, pasteboard, leather, ivory, horn, wood, vellum

Optical/Lab Data

Drawtube data:

Drawtube notes:

Objective Data

	C_A curvature (diopters):	C_B curvature (diopters):	P_D lens power (diopters):	f_D focal length (mm):	t thickness (mm):	free aperture (mm):	full aperture (mm):	nD refractive index:	ν Abbe No.:
Lens 1	1.91 ± 0.007	-1.90 ± 0.007	1.96 ± 0.012	509.00 ± 3	1.98		23.00	1.52 ± 0.003	54.00 ± 3
Complete

Eyepieces

Notes:

Eyepiece 1

	f_D focal length (mm):	free aperture (mm):	full aperture (mm):	s spacing (mm):	C_A curvature (diopters):	C_B curvature (diopters):	M magnification:	FOV field of view (degrees):	Thickness:
Lens 1	48.90
Lens 2	43.20

Eyepiece 2

	f_D focal length (mm):	free aperture (mm):	full aperture (mm):	s spacing (mm):	C_A curvature (diopters):	C_B curvature (diopters):	M magnification:	FOV field of view (degrees):	Thickness:
Lens 1	55.90
Lens 2	48.90
Lens 3	49.00

Eyepiece 3

	f_D focal length (mm):	free aperture (mm):	full aperture (mm):	s spacing (mm):	C_A curvature (diopters):	C_B curvature (diopters):	M magnification:	FOV field of view (degrees):	Thickness:
Lens 1	48.90

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Dioptrice is made possible by the generous support of the National Science Foundation, the National Endowment for the Humanities, the Program in the History and Philosophy of Science at the University of Notre Dame, and the Adler Planetarium & Astronomy Museum.

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+ Look for Non-Blank Fields:	Maker Signature Year Manufacturing Location Inscriptions Provenance Drawtube Notes Public Notes Private Notes Objective Focal Length Eyepiece Focal Length Objective Notes Eyepiece Notes Magnification
+ Year range:	1600 - 2014
+ Focal length range (mm):	0 - 2000
+ Free aperture range (mm):	0 - 2000
+ Full aperture range (mm):	1600 - 2014
+ Open length range (mm):	0 - 2000
+ Closed length range (mm):	0 - 2000
+ Categories:	Art Collection Book or Manuscript Instrument Collection
+ Materials:	organics bamboo black ivory bone boxwood ebony fish skin horn ivory lacquer leather lignum vitae mahogany paper parchment pasteboard rayskin shagreen sharkskin tortoiseshell vellum wood metal brass copper gilt gold leaf gold tooling iron platinum tooling silver silver tooling unknown glass glass rock crystal speculum other marble paint stone
+ Collection:
+ Objective type:	(all refractors) (all reflectors) (clear selection) N/A cassegrain doublet (crown forward) doublet (flint forward) doublet (unknown) gregorian herschelian newtonian singlet triplet unconfirmed unknown reflector

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Objective Data

Eyepieces