Takahashi Sky-90 Coupling #10 (DT)

Product Overview

The #10 coupling in DT form for the Takahashi Sky-90. Couplings are the joining pieces of a Takahashi train — each one carries a particular thread pairing and a particular optical length, and the numbered codes are how Takahashi keeps them apart.

Who It's For

This is a good match if you own a Sky-90 and are assembling or repairing the train that connects it to a camera or visual accessory.

Key Features & Design

• Made for the Sky-90: Takahashi lists this coupling for that telescope.
• #10 DT form: one specific coupling in Takahashi's numbered range.
• Mechanical only: no optical elements, so it does not change focal length or field.

Recommended Uses

Assembling a Sky-90 imaging or visual train, joining the telescope to the camera adapter or accessory that follows it.

Compatibility and Accessory Notes

Listed for the Sky-90. Takahashi's numbered couplings are close cousins of one another and neither the thread pairing nor the optical length is published on this listing — both matter when a corrector has a backfocus figure to hit. Tell us what you are joining and we will confirm the coupling and the spacing before you order.

Good to Know Before You Order

Numbered range, similar parts: Takahashi's couplings differ by number rather than by name. If you are replacing a part, quoting us the code from your existing one is the surest route.

Optical length is not published: every coupling contributes to the backfocus total. We are happy to add it up with you.

Frequently Asked Questions

Is it difficult to set up?

No — it threads into place in the train.

Which telescope is it for?

The Sky-90.

Does it change the focal length?

No — there are no optics in it.

How do I know this is the right coupling for my setup?

Send us what sits either side of it in your train and we will confirm it.

Bottom Line

Takahashi's #10 DT coupling for the Sky-90 — one specific joining piece in the Sky-90 train, worth confirming against your setup.