Takahashi TOA130FN Flattener Wide T-Mount

Product Overview

The TOA130FN combines a field flattener with a T-mount adapter in one part, built for DSLR and 35mm film photography on the TOA-130. It attaches your camera directly to the telescope through a T-Ring (sold separately), or through the Extender TOA when you need additional focal length.

Who It's For

This is what you need if you own a TOA-130 and want to shoot with a DSLR or 35mm film body directly on the telescope, with the field corrected for a flat frame.

Optical / Mechanical Design

Combining the flattener and T-mount interface into a single part removes one connection point from the imaging train compared with fitting a separate flattener and T-ring adapter — fewer joints to seat correctly, and one less place for the stack to drift out of square. The flattener element corrects the field curvature the TOA-130's triplet objective otherwise produces at prime focus.

Recommended Uses

• DSLR and 35mm film astrophotography on the TOA-130 at prime focus, corrected for field curvature.
• Extending the setup with the Extender TOA when a longer focal length is wanted for the same camera.

Compatibility and Accessory Notes

A camera-specific T-Ring is required and sold separately — the TOA130FN provides the T-mount interface, not the camera-side bayonet. It is also compatible with the Extender TOA for extended focal length work. See the Takahashi Back Focus Guide for TOA-130 back focus figures, and send us your camera body if you want the T-Ring confirmed before you order.

Good to Know Before You Order

• A T-Ring is not included. It is sold separately and is specific to your camera mount — tell us your camera and we will confirm the right one.

Frequently Asked Questions

Is it difficult to set up?

No — it threads onto the TOA-130 and takes a T-Ring on the camera side, combining the flattener and mount into one connection.

Do I need a separate flattener as well?

No — the flattener is built into this part.

Can I use it with the Extender TOA?

Yes — it's compatible with the Extender TOA for extended focal length imaging.

Bottom Line

In short: a combined field flattener and T-mount adapter for DSLR and 35mm imaging on the TOA-130, taking a camera-specific T-Ring on the back.