![]() ![]() Sharpstar 130mm f/2.8 HNT Hyperbolic Newtonian Astrograph 13028HNT - Available in 3 Colors. As a diverging lens, a focal extender works by reducing the angle of convergence of light from the objective lens of a telescope before the light enters the eyepiece (see Figure 2), making it seem as if the light was coming from an objective with a longer focal length and slower focal ratio. Celestron StarSense Explorer DX 130AZ App-Enabled Newtonian Reflector Telescope 22461. Founder Optics Free Mini Binocular SaleĪ focal extender, sometimes called Barlow lens, increases the effective focal length of a telescope and therefore increases the magnification of a given eyepiece used with that telescope.Explore Scientific Splashdown Waterproof Eyepiece Sale.Color Correction & Minus Violet Filters Celestron 2-Inch XLT Diagonal Mirror (for SCT Telescope) William Optics 2 99 Dielectric Dura Bright Carbon Fiber Mirror Diagonal for Refractors William.Providing telescopes, cameras, mounts, & more for amateur astronomers since 2003. ![]() So, thinking Ive already got a healthy lean towards Agena Astro and the GSO diagonal.
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