Alstar SCT Adapter - Bundle with - f/6.3 Reducer Corrector

Do you have a 2" refractor diagonal (standard or dielectric) or clones that you want to use with your SCT or Mak telescope but cannot? Here is the solution you need! In response to requests from several customers, we now offer just the SCT barrel from 2" Alstar SCT diagonals. Alstar SCT Adapter will let you convert compatible push-in (refractor) type diagonals into a standard SCT diagonal without committing extra funds to a brand-new diagonal. With compatible diagonals, you can simply unscrew the chrome barrel on the telescope end of your refractor diagonal. Then insert this barrel in its place and you can now use your refractor diagonal with all telescopes having a standard SCT thread.

• Simply unscrew the 2 inch nosepiece from the diagonal body; and screw this adapter on instead
• This item consists of two coupled adapters that permit you to rotate your SCT diagonal to the desired orientation on your telescope
• The other side has a standard 48 mm: M48 x 0.75 male thread; which is the same thread used on most 2 inch filters; eyepiece/diagonal barrels; etc
• Converts f/10 optical system to faster f/6.3 for a significantly wider field of view
• Reducer shortens the effective focal length of Schmidt Cassegrain telescope optical system by 37 percent