SkyWatcher Newton QUATTRO 200/800 f4 with SESTO SENSO: main features. £810.00 Add to Basket. Best 8" F/4 Newtonian Orian astrograph or Skywatcher Quattro - posted in Beginning Deep Sky Imaging: I ordered an explorer 200pds but after a bit more research I cancelled the order because it seems f4 will be better for astrophotography. A fast focal ratio of f/4 This is especially important for astrophotographers dealing with long exposure times. Imaging telescopes made of less thermally stable material can deviate from optimum focus after long time exposures. Sky-Watcher Quattro 12S f4 Imaging Newtonian. Sky-Watcher Quattro f4 Imaging Newtonian (3) £435.00 Add to Basket. Page 1 of 1: 2 Items: Follow us: Join our mailing list: Signup. The SkyWatcher Quattro 8 is a fast f/4 Newtonian with extra features that make it a really nice OTA for imaging as well as wide field visual observations with the addition of its dedicated coma corrector (sold separately). Shopping with us. It can remain in focus for a longer period of time and long exposure images will stay clear and in focus. This 8” SkyWatcher Quattro f4 Imaging Newtonian has an 800 mm focal length. This SkyWatcher Newton QUATTRO 200/800 f4 is a compact 200mm diameter and 800mm focal length telescope great for astrophotography, thanks to the fast f/4 focal ratio and to the compatibility with the very good f/4 … Having researched both im struggling to decide which will be suit the build Im putting together.
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