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27 mar 2019 · The Celestron RASA 8 is suitable for those that want an ultra-fast astrograph with a wide, flat field of view. 400mm at a blazing fast F/2 is an amazing combination of speed and focal length. If you’re into wide, flat field images of large deep-sky objects, these are useful specs.
16 sty 2021 · This box shows what to expect from the Nexstar 8SE with a f/6.3 focal reducer and standard DSLR. Even with a focal reducer, you can’t get the entire galaxy in frame. You’ll need a different telescope to accomplish that. A lens or telescope with a 300 mm focal length should be perfect for getting the entire galaxy in frame.
21 mar 2005 · The basic specs on this TEC scope are as follows: 8" f/11 Mak-Cass., 2200mm focal length, 32% central obstruction, zero-expansion Sitall mirrors, micrometer moving-mirror focusing, internal fan, with a tube weight of about 20 lbs.
With a 30mm 80 deg AFOV eyepiece, it provides a 4+ deg TFOV - and is stunning for targets like the Pleiades and the Andromeda galaxy. With a 24 Panoptic, the TFOV is nearly enough to enclose Orion's belt, and both the 24 Panoptic and 13mm Naglers gave excellent views of M42.
20 lis 2006 · Both the LXD-75 8” Schmidt-Cassegrain telescope and the LX-90 8” Schmidt Cassegrain telescope are fine instruments. With 8” of aperture both telescopes can go deep with a good range of observable objects.
