Takahashi Multi-Reducer 0.85x-L for FC-76 / FC-60 / FC-65 Series

Product Overview

The L version of Takahashi's 0.85x Multi-Reducer, matched to the FC-76 series and the FC-60 and FC-65: specifically the FC-76DCU, FC-76DS, FC-76DP, FC-76DC, FC-60, FC-65 and FC-76. On an FC-76D it gives 486 mm at f/6.4, with a Ø44 mm image circle that covers a full-frame sensor.

The Multi-Reducer comes in three versions, and the letter is not a size preference — it identifies which telescope family the reducer is computed for. L is the FC-76 and FC-60/65 series; S is the FS-60 series; M is the FCT-65D and FC-50.

Who It's For

This is a good match if you image with an FC-76-series tube, or with an FC-60 or FC-65, and want the reducer Takahashi computed for it.

Key Features & Design

• 486 mm at f/6.4 on the FC-76D: the headline configuration for this version.
• Ø44 mm image circle: covers a full-frame sensor.
• Seven compatible tubes: the widest coverage of the three versions.
• Four elements in three groups: reduces and flattens together.
• M55.9 (P=0.75) telescope side, M52 (P=0.75) camera side.
• Ø60 × 54.3 mm, approx. 210 g.

Optical / Mechanical Design

A 0.85x reduction takes 15% off the focal length and speeds the focal ratio to match — modest next to a 0.6x or 0.7x reducer, and one that keeps image scale usable rather than collapsing it. The four-element, three-group design is what holds the Ø44 mm circle: it corrects field curvature across a full-frame sensor while reducing, which a simpler design would not manage at this speed.

Recommended Uses

Wide-field deep-sky imaging on an FC-76, FC-65 or FC-60: large nebulae, star fields, and framing that benefits from the extra field and shorter exposures.

Compatibility and Accessory Notes

Threads are M55.9 (P=0.75) on the telescope side and M52 (P=0.75) on the camera side. Note that the FC-76DP also has a dedicated 76DP FU Reducer 0.64x, which is a stronger corrector than this one — we stock it if you want the shorter focal length.

Good to Know Before You Order

The letter identifies the telescope, not the length: S, M and L all reduce by 0.85x. Ordering by telescope model is the way to get the right one.

A stronger option exists for the FC-76DP: the 0.64x FU reducer. This 0.85x is the gentler reduction across the wider family.

An imaging corrector: designed for a camera at the focal plane rather than an eyepiece.

Frequently Asked Questions

Is it difficult to set up?

No — it threads into the train on M55.9 at the telescope and M52 at the camera.

What will my FC-76D become?

486 mm at f/6.4.

Will it cover a full-frame camera?

Yes — Ø44 mm image circle.

Which telescopes does it fit?

The FC-76DCU, FC-76DS, FC-76DP, FC-76DC, FC-60, FC-65 and FC-76.

Bottom Line

The FC-76 version of Takahashi's 0.85x Multi-Reducer — 486 mm at f/6.4 on an FC-76D, over a full-frame field.