A focal reducer widens the field of view by reducing the focal length of the telescope and thus increasing its luminosity.
A focal length reducer cuts exposure time in half to capture the same brightness as an object. Focal reducers are a very useful instrument in astrophotography, for telescopes with focal length equal to or greater than f / 10. This is a common "handicap" in refracting optical tubes and small aperture Schmidt-Cassegrain.
In astrophotography, reducing the focal ratio to f / 5 of / 6 is essential if you want to take very detailed photos or take deep sky snapshots. At Raig we have a wide and complete catalog of focal reducers at your disposal.
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