Lens, telescope

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Ingenium, 1974.0488.012
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OBJECT TYPE: WIDE ANGLE
DATE: 1905
ARTIFACT NUMBER: 1974.0488.012

MANUFACTURER: Unknown
MODEL: Unknown
LOCATION: Unknown

More Information

General Information

Serial #: N/A
Part Number: 12
Total Parts: 24
AKA: N/A
Patents: N/A
General Description: glass lens; brass casing

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: N/A
Width: N/A
Height: 9.0 cm
Thickness: N/A
Weight: N/A
Diameter: 7.5 cm
Volume: N/A

Lexicon

Group: Astronomy
Category: Observation equipment
Sub-Category: N/A

Manufacturer

AKA: Unknown
Country: Unknown
State/Province: Unknown
City: Unknown

Context

Country: Canada
State/Province: Ontario
Period: From 1905-1974
Canada: A major piece of the original equipment of the Dominion Observatory, it played an important role in the early astronomical research done in Canada, & later was extensively used in public education programmes. .12 May have been made at Dominion Observatory
Function: Could be used for viewing the moon.
Technical: Telescope which had optics made by a premier optician of the time & mounting also made by one of the best manufacturers of the time. It was one of the largest refracting telescopes in the world when it was built. The original 15" doublet was unusual as flint element placed ahead of crown - supposed to help reduce condensation problems.
Area Notes: Unknown

Details

Markings: At time of cataloguing lens could not be moved/rotated within housing, but crude markings clearly indicate adjustment function.
Missing: N/A
Finish: Glass lens; casing is primarily brass, but light brown and very dark brown-black finishes are unusual.
Decoration: N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Unknown Manufacturer, Lens, telescope, circa 1905, Artifact no. 1974.0488, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingenium.ca/en/id/1974.0488.012/

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