Takahashi TOA-130 0.7x TOA-35 Reducer

Product Overview

The TOA-35 Reducer 130 Set pairs Takahashi's 0.7x TOA-35 reducer with a CA Ring 130 sized for the TOA-130NS and TOA-130NFB, cutting the telescope's native 1000mm f/7.7 down to 698mm f/5.4. The reducer is a 4-element, 3-group ED glass design shared across the whole TOA-35 line — what changes between kits is which CA ring is bundled to match the telescope it's going on.

Who It's For

This kit suits TOA-130NS and TOA-130NFB owners who want a materially faster focal ratio for deep-sky imaging without leaving the TOA series' ED apochromat optics. At f/5.4 it cuts exposure times substantially versus the native f/7.7 while holding a flat Φ44mm image circle.

Key Features & Design

• 4 elements in 3 groups, ED glass: the same optical design used across every TOA-35 reducer kit.
• 0.7x reduction: takes the TOA-130NS/NFB from 1000mm f/7.7 to 698mm f/5.4.
• Φ44mm corrected image circle: flat, sharp field suited to APS-C and smaller full-frame crops.
• Bundled CA Ring 130: sized specifically for the TOA-130's mount, so the kit installs as a matched system.

Optical / Mechanical Design

The reducer threads to the CA Ring 130, which is what's bundled in this specific kit — the ring is what changes between TOA-35 Reducer kits, not the reducer optic itself. Back focus is 65.5mm on the TOA-130NS/NFB. See the Takahashi Back Focus Guide for the full spacing chain.

Recommended Uses

Faster deep-sky imaging on the TOA-130NS/NFB where exposure time matters — nebulae, galaxies, and clusters that benefit from f/5.4 over the native f/7.7; general astrophotography where a shorter focal length better frames larger targets.

Compatibility and Accessory Notes

This is the same 0.7x reducer optic used on the TOA-150B and TSA-120, but bundled here with the CA Ring 130 sized for the TOA-130's mount. TOA-150B and TSA-120 owners use the sibling kit, the TOA-35 0.7x Reducer and Camera Ring (TOA-150, TSA-102/120), which bundles the identical reducer with the larger CA Ring 150 instead — the two kits are not interchangeable between telescopes even though the optic inside them is the same.

Good to Know Before You Order

Sold as a matched kit: the CA Ring 130 is bundled with this reducer, so there's no separate ring to source for the TOA-130.

Frequently Asked Questions

Is it difficult to set up?

No — the reducer threads to the included CA Ring 130, which is sized to install directly on the TOA-130NS/NFB.

What is it best used for?

Deep-sky astrophotography on the TOA-130NS/NFB where the 0.7x reduction to f/5.4 shortens exposures versus native f/7.7.

Is this the same reducer as the TOA-150 kit?

The optic is identical. What differs is the bundled ring — this kit ships with CA Ring 130 for the TOA-130; the TOA-150/TSA-120 kit ships with CA Ring 150 instead.

What else do I need with it?

Your camera's own T-ring or adapter to complete the connection at the 65.5mm back focus figure.

Bottom Line

A matched TOA-35 reducer kit for the TOA-130NS/NFB, cutting the telescope to 698mm at f/5.4 across a Φ44mm image circle, with the CA Ring 130 included.