Several other telescope manufacturers make focal reducers matched to their telescopes; among them are Vixen (www.vixenamerica.com) and Takahashi (www.takahashiamerica.com). General-purpose focal reducers are made by AstroPhysics (www.astro-physics.com), Optec (www.optecinc.com), Lumicon (www. lumicon.com), William Optics (www.williamoptics.com), and other vendors. Lumicon, in particular, makes large-diameter focal reducers to reduce vignetting with larger telescopes.

Before buying a focal reducer, check carefully whether it is designed to work with an SLR camera body (some have A too small) and whether it corrects the aberrations of your type of telescope, since refractors, for instance, are quite different from Schmidt-Cassegrains. Test it carefully when you get it and make sure it works as intended.

Was this article helpful?

0 0
Learn Photoshop Now

Learn Photoshop Now

This first volume will guide you through the basics of Photoshop. Well start at the beginning and slowly be working our way through to the more advanced stuff but dont worry its all aimed at the total newbie.

Get My Free Ebook

Post a comment