Hi bert
my T-mount is from scopestuff , its a short collar ring type about 50mm long with an inside diameter of 38mm . [U](its[B]
#tassintheircataloguehttp://www.scopestuff.com/ss_tadpt.htm ) I am using an lx90 for deep sky pics . The t-mount fits on the visual back followed by t-mount and 350d. I thought my best bet was to place the ac lens inside of the t-mount so that the camera still clears the base of the mount.my present setup is with a small 25mm diameter ,19cm focal length lens placed just inside the visual back I'd be much obliged if you can help me out as i'd like to be able to take much better pics.
regards philip
