06/13/22 Cal Estrada 1 Introduction to DSLR Astrophotography • Relatively simple and inexpensive. – No guiding required. Using consumer Canon DSLR’s. – Home use camera: Canon t3i, 18 MP • No field laptop required. • ISO up to 6400, 30 sec or bulb exposures, swivel screen, zoom live focussing • Sensitivity diminishes in the red “Ha” emission wavelength. – Fast Reflector vs APO • Larger aperature, faster f/#, no chromatic aberration, dewing takes longer, affordable. – Stack of multiple shorter exposures vs single long exposure • No guiding required (no AG mount, separate guide scope & camera, or laptop) • Freeware “Deep Sky Stacker”, process images on a cloudy or rainy night – Polar Aligned Equatorial Mount • Decent unguided 60-90 second exposures at 800 mm using Celestron CGEM – “Local” Dark Sky sites • Blackbird SP, Tuckahoe SP, Cherry Springs SP, Cape Hatteras NC
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9/14/2015Cal Estrada1 Introduction to DSLR Astrophotography Relatively simple and inexpensive. –No guiding required. Using consumer Canon DSLR’s. –Home.
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04/21/23 Cal Estrada 1
Introduction to DSLR Astrophotography
• Relatively simple and inexpensive. – No guiding required. Using consumer Canon DSLR’s.
– Home use camera: Canon t3i, 18 MP• No field laptop required.
• ISO up to 6400, 30 sec or bulb exposures, swivel screen, zoom live focussing
• Sensitivity diminishes in the red “Ha” emission wavelength.
– Fast Reflector vs APO• Larger aperature, faster f/#, no chromatic aberration, dewing takes longer,
affordable. – Stack of multiple shorter exposures vs single long exposure
• No guiding required (no AG mount, separate guide scope & camera, or laptop)
• Freeware “Deep Sky Stacker”, process images on a cloudy or rainy night
– Polar Aligned Equatorial Mount• Decent unguided 60-90 second exposures at 800 mm using Celestron CGEM