Flextube 250 owners - couple of questions please

[Tommohawk]

Hi ll. I'm playing around with an experimental design and have a few question re the Flextube 250.

1. Can you tell me the tube diameter, specifically is it the same as a Quattro ie 288mm?

2. Would it be possible to mount tube rings on underneath the trusses - how much clearance is there? I may want to use it only part extended which would mean that the top ring may have to go under the trusses - make sens hopefully!

I'd be really grateful for any answers - -I've been trying to measure and scale images on the screen without much success!

[Tommohawk]

Gentle nudge - anybody got a Flextube 250 and can answer the questions above please... pretty please!

Diameter - is it 288mm same as Quattro?

Is there room under the struts for tube rings?

thanks!

[Carbon Brush]

Watching this but unable to help very much. Very surprised you have not had a response from the (lots of) 250 owners.

My 250 flextube is on loan to a club at present - in a locked down building thirty odd miles away.

From memory, there won't be enough space between strut and tube for a standard 'chunky' skywatcher ring.
However, a customised ring could fit. That being one filed in the right places.
Or maybe a flat ring like those used on older scopes.

Either solution would compromise tube rotation for use with an EQ mount.

HTH, David.

[Tommohawk]

Thanks. The rings on my Quattro look to be about 12mm thick. I guess I could file down a bit - don't really need to rotate tube so that wouldn't matter.

If I could be sure the mirror cell was interchangeable I would just take a punt.