I'm not sure if that's the problem. A picture is best to explain. On the left, is what screws into the drawtube. The ID is ~57mm. The component on the right is the 2"-1.25" adapter. A 1.25" tube screws into this to allow the use of 1.25" eyepieces. However, when you unscrew this barrel, there's a T-mount thread which I use the attach the camera.
The component on the right is similar to the Lumicon one in the link I provided. The difference is that the Lumicon one has a 2" filter thread. The problem is that the Lumicon one is 2" and will be too SMALL to fit the the holder (left hand component in picture).
You can buy a 2" adapter that fits in the component on the left-hand side, but that increases the height of the focuser. No good for me.
So, can I buy the left hand component but with a 2" ID? I guess I could reduce the ID somehow....
|