Extension Tube for SW AZEQ6

[Acrab67]

Hi,

Does anyone know of any extension tubes compatible with SW EQ6 mounts that are stiff enough and well designed so they don't introduce vibrations to the optical tube?
I've been looking at this model from AstroMechanik, which at first glance seems quite robust, with 10mm thick walls. Does anyone by any chance use one of these?

Thanks

 

Edited January 29, 2022 by Acrab67
correction

[johninderby]

The SW extension is very solid and not too expensive.For some reason they show the extension upside down.

https://www.firstlightoptics.com/sky-watcher-mount-accessories/skywatcher-eq6-extension-tube.html

Edited January 29, 2022 by johninderby

[Acrab67]

Thank you. Yes, that was the first option I looked at, but from what I've read from some users it seems to be not very stable

 

[johninderby]

Very stable. Think some have not fitted it properly. 

[johninderby]

Rowan will be coming out with an extension for the AZ100 mount which has a EQ6 type fitting. That will be great as Rowan quality is amazing.

[almcl]

+1 for the Skywatcher model.

 I use it on my AZEQ6 with the SW 190MN which is quite a heavy beast and haven't noticed any stability problems.  It does need the central clamps to be done up really tight to avoid disturbing the PA when slewing at speed, but have had several OAG guided sessions with PHD2 reporting average oscillation at 0.5" or just below.

[Acrab67]

I'm going to use it for visual, and what I'm really worried about is vibrations when focusing and so on. Is the one you use the new model that comes with the rubber base?

[johninderby]

Not seen one with a rubber base.

I use an AZ100 mount and a Berlebach Planet tripod and zero vibration when focusing. Of course it all depends on what mount and tripod you are using.

[Acrab67]

Yes, it appears that Skywatcher made a couple of design changes, including screw adjustment issues and a rubber base for the extender azimuth rotation issue. It is for use with an AZEQ6 GT in ALTAZ mode, and the SW tripod. I have replaced the stock legs for the tripod with others also made of stainless steel that are longer and 1.5 mm thick, that is, practically double

[almcl]

3 hours ago, Acrab67 said:

Is the one you use the new model that comes with the rubber base?

Mine arrived in July last year and had no rubber base. 

I didn't realise you were visual; never used mine for visual, only imaging.

[jambouk]

The skywatcher one will be fine for visual.

It’s fine for imaging; I have the older version where the only issue is the tube can rotate so needed some anti slip material between the tube and the top of the tripod.