Quote:
Originally Posted by marki
The newt will deliver better contrast as the secondary obstruction is smaller. It will also deliver a wider field of view due to the faster optics. The SCT will deliver a better corrected field (less coma) but by no means perfect as coma still exists on the edge of the field of view and you need to add a reducer/flattener to get the most out of them for photography. The major disadvantage of the newt on a EQ mount is its sheer size (they are big) and the tendency to take a while for the vibration to settle and the position of the focuser which may require some sort of stool or ladder to reach when pointed high in the sky depending on the size of the scope and your height. The SCT has folded optics which make the tube compact and the light exits at the back of the scope allowing a comfortable viewing position. SCT's also have a decent amount of back focus available due to the moving primary mirror but this is off set by mirror flop on scopes without mirror lock. Newts tend to need modification or extra bits and pieces to bring a camera into focus. What you buy really depends on your targets. The newt will eat the SCT for some applications whilst the SCT will win for others. Best buy both  . |
Wondering if it would be possilbe for you to expand on which applications work better for newts and which for SCT's.