Question about Skywatcher 80mm Tube Rings...

[John]

Does anyone know if the standard tube rings that come with a Skywatcher ST80 would also fit an Skywatcher / Orion ED80 ? - or are the OTA's on the latter, fatter ?.

Thanks,

John,

North Somerset

[Jamie]

If the OTA on the latter is fatter then it WOULD matter. :D

Sorry i couldn't help it. Just the same i don't know. :insects1:

[John]

Thanks anyway SkyGuy,

It's good to natter about the fact that it may matter that the latter is fatter :D

[Jamie]

Touchet. :D

[GordonCopestake]

I know the ED80 is in a 100mm tube not an 80mm tube if that helps.

[russ]

Can confirm the rings will NOT fit. The ED80 uses the same tube as the ST102.

Regards

Russ

[GordonCopestake]

It's the same tube as the ED100 too but cut to 600mm (f7.5) rather than 900mm (f9). Must save manufacturing costs as the focuser is the same

[John]

Thanks very much for these responses folks. Just what I needed to know.

John,

North Somerset

[GazOC]

It's the same tube as the ED100 too but cut to 600mm (f7.5) rather than 900mm (f9). Must save manufacturing costs as the focuser is the same

But Synta make 80mm scopes, I can't see why they've used the 100mm OTA at all.

[Naz]

Baffling?

naz

[GazOC]

Baffling?

naz

Maybe Naz, but I've got an ED80 and I can't see what they couldn't have achieved with a 80mm body. The Celestron model has a 80mm body with the same optics..... :?

[GordonCopestake]

Like i said, i think it's a cost reduction thing. Machines all tooled up for 100mm tubes etc

Plus they only have to make one focuser for all 3 OTA's (ED80, ED100, ED120)

[GazOC]

Like i said, i think it's a cost reduction thing. Machines all tooled up for 100mm tubes etc

Plus they only have to make one focuser for all 3 OTA's (ED80, ED100, ED120)

But they have tubes for the StarTravel and Evostar 80mm scopes that would fit. Thats what I don't understand....it must be cheaper to use those?

[GordonCopestake]

Are they crayfords?

[GazOC]

Yep, I edited my post before you posted (just about! ). The thing about the tubes still stands though...

[GordonCopestake]

<Shrug>

Dunno then. Maybe it's something to do with that cool champagne and white colour scheme :puke:

[GazOC]

They were the same colour (blue) as the achros for the first year or so.... :? God knows....