Need help in coupleing camera to scope

I have coupled a video camera to a Nexstar4 using the t-adapter and the T-to-C ring supplied by Celestron. I am using prime fucus only and I notice two things: One the camera is a long way from the scope, and two I see less than 1/4 degree true field. Am I wrong to assume that I am capturing an image beyong the focal point in an expanding cone of light? And if this is so, are there adapters out there that will let me couple closer to the tube? I want as large a true field of view as possible without Vingetting. I have plenty of C-to-C adapter tubes so I can easily adjust back from that position. I am a rank nubie to astro imaging but very excited about the possibilities.

Well, the NS4 is a slow and long telescope. If you were to do the math I wager you'd be seeing magnifications in the 250X+ range. Maybe a focal reducer is in order, or perhaps you could try shooting through the camera's lens assembly?

I don't know, because I've never done it, but maybe someone who has can elaborate on my line of thinking or else negate it

Unless you put lenses at the back of the scope, there is one and only one point at which you are going to come to focus. If you are focused, then the FOV you are getting is the only one you can get without either a Barlow (less FOV, more magnfication) or a reducer (more FOV, less magnification).

Ron Wodaski