The telescopes I use are the Celestron EdgeHD 1400 more commonly known as a C14 EdgeHD and an Astrorubinar. What is an astrorubinar? it’s a mirror telelens with a focal lens of  500 mm at F/D5.6 which makes it ideal for widefield astrophotography. it’s optical formula seems to be similar to a maksutov with a thick corrector plate, but with a secondary mirror cell and a corrector lens were the eyepiece goes. It delivers pinpoint sharp images and a flat field. See details of the telescope I use in the sub-pages below “telecope” tab by leaving your mouse cursor on it .

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