An astrograph (astrographic camera) is a telescope designed for the sole purpose of astrophotography. After having received an astrograph in 1894, the observatory began its work on astrophotography. First, a region of the sky was photographed by a wide-field telescope, or astrograph. They have also added an astrograph to their telescope, giving it dual purpose. He started work on the astrograph catalogue. One of the famous discoveries using an astrograph was planet Pluto. In 1886 a Henry astrograph with 13 inch objective was acquired. The objective of an astrograph is usually not very large, on the order of . The Carnegie telescope (Carnegie Double Astrograph) was intended to study this problem of Galactic rotation. Corrected Dall-Kirkham Astrograph reflector telescope manufactured by Planewave Instruments.