View Single Post
  #4  
Old 27-09-2018, 12:10 AM
Wavytone
Registered User

Wavytone is offline
 
Join Date: Jul 2008
Location: Killara, Sydney
Posts: 4,147
Hi Carlton,

With an SCT you need:

1 low-power eyepiece that gives the widest true field available for the size of the barrel - this means an eyepiece with no field stop inside the barrel. Focal length isn't important - could be anywhere from 25mm to 38mm. The type of eyepiece isn't important either as low-power ones are easy to design. A SWA for example would do nicely and these are under $100, an Erfle or a Plossl will do fine.

A couple of medium power eyepieces around 18 and 12mm, 12mm being a real sweet-spot for SCT's.

A couple of high-power eyepieces - for an f/10 SCT you will find 10, 9 and 7 useful.

Last edited by Wavytone; 27-09-2018 at 12:30 AM.
Reply With Quote