Adaptor plate for 225mm diameter tubes Eris 2″ rack & pinion.

Orion Optics UK

£120

Adaptor plate mates Eris 2 focuser to tube diameter 225mm. Black anodised 4 x mounting screws secures the Eris focuser. Slacken off to rotate around the central axis. Fits tube diameters 225mm 4 x hole centres 53mm radius @ 90 degrees to each other. Outside dimension 90mm square Central hole diameter 80mm 8 x small tilt adjustment screws, will need the tube fixing screws slack to work. 11mm in height on centre axis.

Orion Optics UK's own words, read from their page.

Buy from Orion Optics UKPrice seen 2026-09-04. Affiliate link.

Where this comes from

The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.

UK company
Registered at Companies House as ORION OPTICS UK LIMITED, number 05924501. Checked 2026-08-29.
Means the business is a British legal entity, not a British-sounding name owned elsewhere. It says nothing about where anything is made.
UK operations
Not yet checked.
Means people employed here, or premises they actually work from. We keep this separate from the company badge because a registered office can be an accountant's spare room, and a company can be registered in Britain while everything it does happens somewhere else. Where we have not looked, we say so rather than assuming.
British-owned
No majority shareholding traced outside the UK. Companies House.
Read from the register of people with significant control, following the chain of holding companies. It does not gate anything: a firm can be made here and owned elsewhere, and that is worth telling you rather than hiding.
Where it is made
The maker doesn't say, so neither do we.
This is about the individual product, not the company. A British firm can sell things made abroad, which is normal and not a criticism. We would rather tell you which is which than average them into a score.