It also leads to larger (although fainter) images of extended objects like the Moon or planets for astrophotographers or visual observers.Ī focal reducer does just the opposite of a Barlow lens or focal extender. North Americas highest-rated astronomy shop. A longer effective focal length leads to higher magnification with a given eyepiece for visual observers. Providing telescopes, cameras, mounts, and more for amateur astronomers since 2003. Most amateur astronomers are familiar with a Barlow lens (or a focal extender), a negative or diverging lens that effectively increases the focal length and the focal ratio of a telescope's objective lens. Founder Optics Free Mini Binocular Sale.A Schmidt-Cassegrain telescope with an aperture of 6' to 8' is the most versatile and affordable choice. As with visual observing, a good quality astronomy telescope is required for basic EAA of deep-sky objects. /televue1-25-60-deg-everbrite-diagonal-dpc-6012.html.) 11 212 Souping. Explore Scientific Splashdown Waterproof Eyepiece Sale For a basic EAA set up, you will need the following pieces of equipment: Telescope. Ideal for Bird, Wildlife, and Nature Photography. With a tube made of attractive anodized aluminum alloy, the RedCat 51 is available in a premium red/black finish. Color Correction & Minus Violet Filters Not that the RedCat 51 is all that big: the tube is just 225mm x 80mm (8.9' x 3.1') with the retracted dew shield, and it weighs just 1.47kg (3.24 lbs).Correctors, Focal Reducers & Flatteners.
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