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#Celestron 8 telescope for sale upgrade
The included eyepieces may be able to get you started observing, but you will most likely want to upgrade fairly soon after you purchase the scope. Eyepieces with a larger field of view are typically more immersive, as the area filled with light is larger and takes up more of your sight. Being Plossls, they have a small apparent field of view, which means you will only see a small circle when looking through the eyepiece. These are decent, but being included eyepieces, they are not of great quality. The Celestron NexStar Evolution 8 includes two Plossl eyepieces, a 40mm, and a 12.5mm. Additionally, a HyperStar costs more than the entire telescope and isn’t that useful unless you put the C8 on an equatorial mount. Not all cameras will work with this configuration, however monochrome cameras with filter wheels won’t reach focus and you want to be careful not to obstruct the aperture with a large camera housing. This means that if you purchase Starizona’s Hyperstar corrector, you can remove the secondary mirror and put the Hyperstar in its place to image at f/2 with a cooled astrophotography camera. The C8 has built-in HyperStar compatibility. But for most targets, this is not a problem.
This can make it tricky at times for wide-field observing. This is a very long focal length for such a small telescope and is a great feature for planetary observing. The telescope has a focal ratio of f/10, making the focal length 2000 mm. 8 inches is not likely to reveal great detail on dimmer objects, especially galaxies, so this telescope is more suited to nebulae, star clusters, planets, etc., which are all relatively bright objects.
#Celestron 8 telescope for sale portable
This is an ideal size for beginning astronomers or those who want something portable yet with a decent aperture.
The Evolution 8 is, as the name suggests, an 8” (200mm) telescope.
The advantage of an SCT telescope is that it is extremely short thanks to the fast primary mirror, but the actual focal ratio is f/10 after reflecting off of the secondary mirror. The SCT telescope uses a corrector plate in the front, an extremely fast f/2 primary, and a convex secondary mirror. The C8 is an SCT, or Schmidt-Cassegrain telescope. The Evolution 8 is available with an EdgeHD upgrade and a StarSense autoalign bundle, but we don’t see a reason to shell out the funds – the EdgeHD won’t perform any differently for visual use and the StarSense is unnecessary. Apart from updates to the coatings and manufacturing process, the C8 has changed little in terms of performance or design in the past 50 years – though Celestron does sell an EdgeHD C8 in various incarnations that have improved field flattening for astrophotography and ventilation holes. The Evolution 8 is the latest of Celestron’s 8” Schmidt-Cassegrains known as the C8, with design roots tracing back to the 1960s and the original orange-tube C8 having debuted in 1970. Pic by Zane Landers The Evolution of C8, The Optical TubeĪs the name of the telescope suggests, the NexStar Evolution 8 is an evolution from the older line of Celestron telescopes.
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