Takahashi Universal Rack and Pinion Focuser 36.4mm (Mewlon / CN)

Product Overview

Takahashi's universal rack-and-pinion focuser in its 36.4 mm form, listed for the Mewlon and CN series. The 36.4 mm figure is the drawtube size — Takahashi's own long-standing thread standard, which their visual accessories are built around.

A rack-and-pinion focuser drives the drawtube on a toothed rack rather than a friction roller, which is what gives it the ability to hold a load without slipping — the reason it suits a Cassegrain carrying a diagonal and eyepiece or a camera at the back.

Who It's For

This is a good match if you run a Mewlon or CN series telescope and want the 36.4 mm rack-and-pinion focuser, either as an upgrade or a replacement.

Key Features & Design

• 36.4 mm drawtube: Takahashi's own thread standard for visual accessories.
• Rack-and-pinion drive: positive engagement that holds position under load.
• Listed for Mewlon and CN: one of four versions in this focuser range.

Recommended Uses

Visual observing and imaging on a Mewlon or CN series telescope, where the focuser carries a diagonal and eyepiece or a camera train.

Compatibility and Accessory Notes

Takahashi builds this focuser in four combinations: 36.4 mm and 50.8 mm drawtube sizes, each in a Mewlon-250 version and a Mewlon/CN version. We stock all four. The drawtube size decides which accessories thread on — 36.4 mm is Takahashi's own standard, 50.8 mm is the 2″ format most modern eyepieces and imaging trains use. Tell us your exact telescope and what you are putting behind the focuser and we will confirm which of the four you want.

Good to Know Before You Order

Four versions exist: two drawtube sizes across two telescope fittings. Matching both is what gets the right part, and we will check it with you.

Mewlon/CN or Mewlon-250: Takahashi lists a separate version specifically for the Mewlon-250. If that is your telescope, the other one is likely the one you want — worth confirming with us either way.

We are still waiting on a product photo: Takahashi's listing carries no image for this focuser, so the page shows none rather than a picture of a different version. Ask us and we will photograph or describe the item in stock.

Frequently Asked Questions

Is it difficult to set up?

Fitting a focuser is more involved than adding an accessory — it mounts to the telescope's rear cell. If you would rather not do it yourself, talk to us before you order.

What does 36.4mm refer to?

The drawtube size, which is Takahashi's own thread standard for visual accessories.

Which telescopes is it for?

The Mewlon and CN series. The Mewlon-250 has its own listed version.

Should I get 36.4mm or 50.8mm?

50.8 mm is the 2″ format that most modern eyepieces and camera adapters use; 36.4 mm is Takahashi's native standard. Tell us what you are attaching and we will advise.

Bottom Line

The 36.4 mm rack-and-pinion focuser for Mewlon and CN telescopes — Takahashi's native thread, in one of four versions worth confirming against your setup.