OK, its just an extension tube. How much praise can you heap on it? This part is gorgeous, gorgeous finishes, brass barrel, brass compression ring, nice internal baffle threading for fine reflection control. As far as extension tubes go, this is typical Takahashi quality, superb.

I needed to upgrade my FS-128 NSV to accept 2 oculars so got this extension tube along with the TOA0400 visual back. Typical Tak quality, rock solid. Two small nits however, they are annodized so arent flat black... perhaps they dont need it inside but the 1.25 back the scope came with was. The second nit is it/they didnt come with a dust plug. Not a big deal but it would have been nice. But as the heading says, this extension tube is the perfect length for my NSV. All of my oculars come to focus with room to spare on either side of focus. Recommended.