|
The thing to remember is that these are quite different designs which have been put together with different aims.
An SCT main strength is it has a compact OTA and its long focal length ( I assume it is an f10 so about 2800mm) makes it a high power scope. High power will always come at a cost in the image as you also magnify any aberrations or atmospheric issues.
To give a fair comparison you really should ensure that the magnification is the same.
Also a couple of things with your post. Firstly more aperture will not make an image bigger, that is a function of the focal length either of the OTA and/or the eyepiece. A larger aperture can make a scope more amenable to higher power. My old 12" was struggling to push much past 120x on most nights while I can often use 250x in my 20".
Secondly, SCT's have never been designed as an imaging scope, rather as a reasonable compromise to be used for either imaging or visual. Personally I would always prefer to use a newt for visual before an SCT ( based on personal experience, admittedly limited as I have on looked through an SCT on maybe half a dozen occasions) and they are not the commonest imaging scope. However as a scope that can do both reasonably well they are not a bad compromise.
Malcolm
|