When I experimented with my Canon T2i attached to my scope using the T-ring, all I can see is the silouette of the secondary mirror and the spider arms. When I use my Eye-piece projection tube attached to my T-ring, I can see the image in the Eye-piece. I don't have a low-profile focuser. Is that why my attempt with no 'Eye-piece' failed? I did try using my 2x Barlow, but the results didn't change.