5" Tube rings needed

Hi all,

Anyone come across tube rings for a 5" (125mm) tube anywhere?

Cheers
Ian.

On Thu, 25 Aug 2005 22:07:53 +0300, John Shakespeare
wrote:

Hi Ian,

Ian Sharp wrote:
Hi all,

Anyone come across tube rings for a 5" (125mm) tube anywhere?

Is it a 5"/127mm (outside diameter) tube, or a tube for a 5"/127mm
aperture scope? There is a big difference, as the Synta 5"/127mm mak has
a 144mm diameter tube. Rings are available for common scopes by name,
but it's safest to measure the outside diameter of your tube carefully
and supply that dimension as well as your scope type when enquiring
about suitable rings.

Telescope Service in Germany have a selection of rings:
http://www.teleskop-service.de/Selbs...hrschellen.htm
I've bought a number of items from them in the last several years, and
they are competent and helpful (and can handle email in English).

Best Regards,
John.

P.S. The difference between 5" and 125mm is 2mm, which is a significant
error for sizing a tube ring.

Hi John,

This is for a real telescope ;-)

Ian physically has the tube and will no doubt supply the sizes in due
course.

--
Pete
http://www.digitalsky.org.uk
Recent images http://www.digitalsky.org.uk/recent/recent_images.html
** Last update June 24 2005 **

Hi Ian,

Ian Sharp wrote:
Hi all,

Anyone come across tube rings for a 5" (125mm) tube anywhere?

Is it a 5"/127mm (outside diameter) tube, or a tube for a 5"/127mm
aperture scope? There is a big difference, as the Synta 5"/127mm mak has
a 144mm diameter tube. Rings are available for common scopes by name,
but it's safest to measure the outside diameter of your tube carefully
and supply that dimension as well as your scope type when enquiring
about suitable rings.

Telescope Service in Germany have a selection of rings:
http://www.teleskop-service.de/Selbs...hrschellen.htm
I've bought a number of items from them in the last several years, and
they are competent and helpful (and can handle email in English).

Best Regards,
John.

P.S. The difference between 5" and 125mm is 2mm, which is a significant
error for sizing a tube ring.

The tube diameter is spot on 5" as accurately as I can measure. Something
slightly bigger could be OK as I could pad out with felt or similar.
Cheers
Ian.

"John Shakespeare" wrote in message
...
Hi Ian,

Ian Sharp wrote:
Hi all,

Anyone come across tube rings for a 5" (125mm) tube anywhere?

Is it a 5"/127mm (outside diameter) tube, or a tube for a 5"/127mm
aperture scope? There is a big difference, as the Synta 5"/127mm mak has a
144mm diameter tube. Rings are available for common scopes by name, but
it's safest to measure the outside diameter of your tube carefully and
supply that dimension as well as your scope type when enquiring about
suitable rings.

Telescope Service in Germany have a selection of rings:
http://www.teleskop-service.de/Selbs...hrschellen.htm
I've bought a number of items from them in the last several years, and
they are competent and helpful (and can handle email in English).

Best Regards,
John.

P.S. The difference between 5" and 125mm is 2mm, which is a significant
error for sizing a tube ring.

Hi Ian,

Ian Sharp wrote:
The tube diameter is spot on 5" as accurately as I can measure. Something
slightly bigger could be OK as I could pad out with felt or similar.
Cheers
Ian.

Exactly 5" does not seem to be a common tube diameter. Padding to the
next size up (136mm or 139mm) is possible, but might be tricky to do
uniformly. There are some rings which supposedly adjust to a range of
diameters, but I've no idea how good they are. The link I gave earlier
(below) has some.

Best Regards,
John.


"John Shakespeare" wrote in message
...

Hi Ian,

Ian Sharp wrote:

Hi all,

Anyone come across tube rings for a 5" (125mm) tube anywhere?

Is it a 5"/127mm (outside diameter) tube, or a tube for a 5"/127mm
aperture scope? There is a big difference, as the Synta 5"/127mm mak has a
144mm diameter tube. Rings are available for common scopes by name, but
it's safest to measure the outside diameter of your tube carefully and
supply that dimension as well as your scope type when enquiring about
suitable rings.

Telescope Service in Germany have a selection of rings:
http://www.teleskop-service.de/Selbs...hrschellen.htm
I've bought a number of items from them in the last several years, and
they are competent and helpful (and can handle email in English).

Best Regards,
John.

P.S. The difference between 5" and 125mm is 2mm, which is a significant
error for sizing a tube ring.

Thanks John,

This is a very old telescope - Patrick Moore's 5" Cooke Refractor.

Cheers
Ian.

"John Shakespeare" wrote in message
...
Hi Ian,

Ian Sharp wrote:
The tube diameter is spot on 5" as accurately as I can measure. Something
slightly bigger could be OK as I could pad out with felt or similar.
Cheers
Ian.

Exactly 5" does not seem to be a common tube diameter. Padding to the next
size up (136mm or 139mm) is possible, but might be tricky to do uniformly.
There are some rings which supposedly adjust to a range of diameters, but
I've no idea how good they are. The link I gave earlier (below) has some.

Best Regards,
John.


"John Shakespeare" wrote in message
...

Hi Ian,

Ian Sharp wrote:

Hi all,

Anyone come across tube rings for a 5" (125mm) tube anywhere?

Is it a 5"/127mm (outside diameter) tube, or a tube for a 5"/127mm
aperture scope? There is a big difference, as the Synta 5"/127mm mak has
a 144mm diameter tube. Rings are available for common scopes by name, but
it's safest to measure the outside diameter of your tube carefully and
supply that dimension as well as your scope type when enquiring about
suitable rings.

Telescope Service in Germany have a selection of rings:
http://www.teleskop-service.de/Selbs...hrschellen.htm
I've bought a number of items from them in the last several years, and
they are competent and helpful (and can handle email in English).

Best Regards,
John.

P.S. The difference between 5" and 125mm is 2mm, which is a significant
error for sizing a tube ring.

Hi Ian,
Ian Sharp wrote:
Thanks John,

This is a very old telescope - Patrick Moore's 5" Cooke Refractor.

Cheers
Ian.

Perhaps such a special scope deserves bespoke rings, rather than a nip &
tuck job or one-size-fits-all treatment.

Best Regards,
John.

"John Shakespeare" wrote in message
...

Hi Ian,

Ian Sharp wrote:

The tube diameter is spot on 5" as accurately as I can measure. Something
slightly bigger could be OK as I could pad out with felt or similar.
Cheers
Ian.

Exactly 5" does not seem to be a common tube diameter. Padding to the next
size up (136mm or 139mm) is possible, but might be tricky to do uniformly.
There are some rings which supposedly adjust to a range of diameters, but
I've no idea how good they are. The link I gave earlier (below) has some.

Best Regards,
John.


"John Shakespeare" wrote in message
...


Hi Ian,

Ian Sharp wrote:


Hi all,

Anyone come across tube rings for a 5" (125mm) tube anywhere?

Is it a 5"/127mm (outside diameter) tube, or a tube for a 5"/127mm
aperture scope? There is a big difference, as the Synta 5"/127mm mak has
a 144mm diameter tube. Rings are available for common scopes by name, but
it's safest to measure the outside diameter of your tube carefully and
supply that dimension as well as your scope type when enquiring about
suitable rings.

Telescope Service in Germany have a selection of rings:
http://www.teleskop-service.de/Selbs...hrschellen.htm
I've bought a number of items from them in the last several years, and
they are competent and helpful (and can handle email in English).

Best Regards,
John.

P.S. The difference between 5" and 125mm is 2mm, which is a significant
error for sizing a tube ring.

Hi John,

Yes, I'm looking into this with a local metal-working company. I
suspect it will be the route I will take.

Cheers
Ian.