Who sells 2" focuser extension tubes

Starkler (Geoff) · #1 11-05-2006, 07:23 PM

Anyone is Oz ?

TIA for any helpful replies

janoskiss (Steve H) · #2 11-05-2006, 07:35 PM

Bintel's got some: the televue ones, very expensive, and some generic ones in 35 and 50mm lengths, also a bit expensive for what they are, but I guess they are not a high demand item.

JohnG (John) · #3 11-05-2006, 07:58 PM

TeleVue has 2" and 3" extension tubes at Bintel as already said, William Optics also has a 2" tube, Lumicon in the US has a number of different sizes as well, you might also want to have a look on the Scopestuff site as well.

JohnG

asimov (John) · #4 11-05-2006, 08:08 PM

What about a local engineer making one for you? I know 2" exhaust tubing fits a 2" focuser with a light skim taken off with a lathe.

Just a thought.

33South (Chris) · #5 11-05-2006, 08:22 PM

Bintel do two of their own $35/39 depending on size, must be cheaper than getting them made ?
Ive got the 50mm does the job just fine.

https://www.bintelshop.com.au/welcome.htm

Telscope accessories page 1

asimov (John) · #6 11-05-2006, 08:48 PM

Yep, that would be cheaper than getting one made for sure.

ballaratdragons (Ken) · #7 11-05-2006, 08:53 PM

Whatever happened to using trusty PVC tubing. I find heaps of astronomical uses for it

and you can cut it to whatever length you want.

Miaplacidus (Brian) · #8 11-05-2006, 09:14 PM

Do the Bintel generic extenders have brass compression rings?

Ta,

Brian.

33South (Chris) · #9 11-05-2006, 10:21 PM

Quote:

Originally Posted by Miaplacidus

Do the Bintel generic extenders have brass compression rings?

Ta,

Brian.

Hi Brian,
Yes mine does - works fine - there is only one thumbscrew.
Also the "insertion neck" has a recessed groove and an internal thread.

Chris.

Starkler (Geoff) · #10 11-05-2006, 10:22 PM

Cool the Bintel ones seem to be as good as any, with a brass compression ring and the price is better than what I have seen on OS sites

Thanks.

Blue Skies (Jacquie) · #11 12-05-2006, 12:15 AM

Quote:

Originally Posted by 33South

Bintel do two of their own $35/39 depending on size, must be cheaper than getting them made ?
Ive got the 50mm does the job just fine.

https://www.bintelshop.com.au/welcome.htm

Telscope accessories page 1

I bought one of these recently and it works perfectly. I put an old Type 2 12mm Nagler in it in a JMI reverse crayford focuser. Works a treat!