I am unable to wind in the focus on my skywatcher 200 to achieve focus when a standard barlow is between tube and camera. I am seeking recommendations on a shorter version Barlow (with t ring) so that I can gain focus on Jupiter, Saturn on the camera. As far as I can see it would appear that longer barlows are around 5-6 inches and the shorter units are 2-3 inches. This reduced length would likely deliver the space I need to gain a focus.
Appreciate any advice on others who've no doubt overcome this issue.