Reading various threads on the limitations of using a DSLR on a Dobsonian, it seems that general consensus is that the camera sensor needs to get closer to the Scopes Mirror.
There seems to be 3 main ways of achieving this :
- Moving the Primary Mirror (seems a bit drastic)
- Low profile Eyepiece mount (requires some mods / hole drilling......hopefully I'm correct with this one)
- Add a Barlow lens to magnify the image (simple but not always enough magnification)
It is the last one that has me thinking about a possible solution and not sure if anyone has tried it.
Does the addition of a Tele-Converter on the DSLR get you the "perceived" extra distance that you need for the Camera sensor to focus ?
Therefore...Camera + TC + Adapter + T-Ring + Barlow