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2. Dragonfly Telephoto Array - Wikipedia

   en.wikipedia.org/wiki/Dragonfly_Telephoto_Array

   [4] [5] [6] The array is designed to accommodate the addition of lenses to increase its effective aperture with each additional lens. [3] With 48 lenses, the instrument has a light gathering power equivalent to a 400 mm f /0.4 lens, or a refracting telescope with an objective lens diameter of 990 mm (39 in). In March 2021 plans were announced ...

3. The best lenses for astrophotography in 2022: fast ... - AOL

   www.aol.com/news/best-lenses-astrophotography...

   We pick the best lenses for astrophotography fans shooting a starry night sky, to suit a range of cameras and budgets The best lenses for astrophotography in 2022: fast ultra-wide lenses for the ...

4. Astrophotography - Wikipedia

   en.wikipedia.org/wiki/Astrophotography

   The Hubble Space Telescope shortly after the STS-125 maintenance mission in 2009. The late 20th century saw advances in astronomical imaging take place in the form of new hardware, with the construction of giant multi-mirror and segmented mirror telescopes. It would also see the introduction of space-based telescopes, such as the Hubble Space ...

5. List of telescope parts and construction - Wikipedia

   en.wikipedia.org/wiki/List_of_telescope_parts...

   Primary lens: The objective of a refracting telescope. Primary mirror: The objective of a reflecting telescope. Corrector plate: A full aperture negative lens placed before a primary mirror designed to correct the optical aberrations of the mirror. Schmidt corrector plate: An aspheric-shaped corrector plate used in the Schmidt telescope.

6. Astrograph - Wikipedia

   en.wikipedia.org/wiki/Astrograph

   This is a modern amateur Newtonian astrograph, specifically designed for astrophotography. An astrograph (or astrographic camera) is a telescope designed for the sole purpose of astrophotography. Astrographs are mostly used in wide-field astronomical surveys of the sky and for detection of objects such as asteroids, meteors, and comets.

7. Sloan Digital Sky Survey - Wikipedia

   en.wikipedia.org/wiki/Sloan_Digital_Sky_Survey

   SDSS uses a dedicated 2.5 m wide-angle optical telescope; from 1998 to 2009 it observed in both imaging and spectroscopic modes. The imaging camera was retired in late 2009, since then the telescope has observed entirely in spectroscopic mode. Images were taken using a photometric system of five filters (named u, g, r, i and z).