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1.375-inch telescope objective
1.375-inch telescope objective

1.375-inch telescope objective

Date1890-1910
Inventory Number2007-1-0186
ClassificationTelescope Objective
Subject
    Maker American
    Cultural Region
      Dimensions5.4 x 5.4 x 3.6 cm (2 1/8 x 2 1/8 x 1 7/16 in.)
      Material
        DescriptionThis is a 1.375-inch objective lens formed of two cemented elements. The cement is crazing.

        The cell has a front barrel for a sun shade. The flange behind this barrel is curvy on the backside where it meets a brass collar. The collar has three holes for the insertion of screws when attaching this objective cell to a telescope tube.
        Signedunsigned
        Curatorial RemarksThis objective is by the same maker as the objective in 1997-1-0035.
        1.375-inch refracting telescope
        1.375-inch refracting telescope
        American
        Date: circa 1900
        Accessories: None
        Object number: 1997-1-0035
        3.5-inch objective lens with collar
        3.5-inch objective lens with collar
        Henry Fitz
        Date: circa 1860
        Object number: 1996-1-0485
        9.5-inch telescope objective for finder to 60-inch reflecting telescope
        9.5-inch telescope objective for finder to 60-inch reflecting telescope
        Andrew A. Common
        Date: circa 1889
        Accessories: box
        Object number: 1997-1-0037
        3-inch refracting telescope
        3-inch refracting telescope
        Noël Jean Lerebours
        Date: 1830-1840
        Object number: 1997-1-1823
        5-inch telescope objective with correcting doublet lens for astrograph
        5-inch telescope objective with correcting doublet lens for astrograph
        American
        Date: 1900-1930
        Object number: 1997-1-0084
        8.25-inch objective lens for meridian circle
        8.25-inch objective lens for meridian circle
        Alvan Clark and Sons
        Date: 1867
        Accessories: wooden box; screws (3)
        Object number: HA0112e
        5.5-inch telescope objective with correcting doublet lens for astrograph
        5.5-inch telescope objective with correcting doublet lens for astrograph
        American
        Date: 1900-1930
        Object number: 1997-1-0083
        6-inch telescope objective
        6-inch telescope objective
        Alvan Clark and Sons
        Date: 1890-1920
        Object number: 1997-1-0082
        1.75-inch refracting telescope
        1.75-inch refracting telescope
        Alvan Clark and Sons
        Date: 1880-1910
        Object number: 1997-1-0032
        1.5-inch refracting telescope
        1.5-inch refracting telescope
        Alvan Clark and Sons
        Date: 1880-1910
        Object number: 1997-1-0033
        6-inch refracting telescope
        6-inch refracting telescope
        Alvan Clark and Sons
        Date: 1910
        Accessories: shipping crate, terrestrial eyepiece, dust cap, mount and tripod (2003-1-0077b)
        Object number: 2003-1-0077a
        4.5-inch telescope objective
        4.5-inch telescope objective
        Bausch & Lomb Optical Company
        Date: circa 1900
        Object number: 1996-1-0481o