... My Setup ...
My 11 inch Celstron Schmidt-Cassegrain EdgeHD scope and Computerized German Equitorial Mount (CGEM)
My 11 inch Celstron Schmidt-Cassegrain EdgeHD telescope and Computerized German Equitorial Mount (CGEM).
It is extremely important that the telescope is mounted correctly with the declination axis point to the north celestial pole (Very near the 'North Star" Polaris). Once this is aligned, then once the scope is set on the target, the sidereal motion of the earth is followed by the " right ascension “ guidance of the clock drive in the mount and enhanced by the guiding scope and software to keep it locked on the target.
Besides the telescope, numerous accessories are needed including a portable 12 volt power supply, and a guide-scope to help keep the main telescope directly on the target to be photographed over time. Since the earth is rotating 15° per hour from west to east, the telescope must rotate along with it to track a celestial object. A camera attached to the prime focus is need to photograph the object. In this case, a Canon EOS T2i DSLR. There are many digital astro-cameras available too (but sit down when you view the price tags). Also needed is a laptop computer to aid in tracking and photography.
Dew and City Light Pollution
A Dew shield aids in the reduction of dew on the lens plus aids in blocking some of the city light pollution. also, lens heating "dew buster" straps reduce or even eliminate dew formation.
In addition, variable camera filters will aid in blocking out the erant city light. There are numerous one available, but like all the other accessories, they come with a price tag. I have a Orion Skyglow Imaging filter that is helping somewhat.
Some of the software that I use to aid in my astrophotography include: