- Commodity name: FRA400C 0.7x Full-Frame Reducer
- Commodity ID: FRA400C 0.7x Full-Frame Reducer
Specific FRA400C 0.7x full-frame reducer.
Specially designed for the FRA400C, this 0.7x reducer adopts a triplet lens design, it can reduce the overall focal length to 280mm and the focal ratio to F3.9 while providing a flat-field correction. When used with the reducer, the FRA400C supports full-frame imaging and the back focus is a standard 55mm.
The shorter focal ratio enables the telescope to achieve a wider field of view and faster exposure times, making it ideal for capturing large nebulae, star clusters, as well as faint and fast-moving celestial objects.
The FRA400C reducer features an M48×0.75 rear-end adapter and has a built-in 2-inch filter thread for convenient filter attachment.

0.7x Reducer Parameters
（After attaching）FRA400C Focal length	280mm
（After attaching）FRA400C Focal ratio	f/3.9
Lens Number	Triplet design
Back Focus	55mm（from the base of M48 male thread）
Weight	0.46kg
Rear-end thread type	M48×0.75 (M48×0.75 filter thread inside)

0.7x Reducer Size Diagram

0.7x Reducer Installation

Spot Diagram

Product introduction

Specially designed for the FRA400C, this 0.7x reducer adopts a triplet lens design, it can reduce the overall focal length to 280mm and the focal ratio to F3.9 while providing a flat-field correction. When used with the reducer, the FRA400C supports full-frame imaging and the back focus is a standard 55mm.

The shorter focal ratio enables the telescope to achieve a wider field of view and faster exposure times, making it ideal for capturing large nebulae, star clusters, as well as faint and fast-moving celestial objects.

The FRA400C reducer features an M48×0.75 rear-end adapter and has a built-in 2-inch filter thread for convenient filter attachment.

Specifications

0.7x Reducer Parameters
（After attaching）FRA400C Focal length	280mm
（After attaching）FRA400C Focal ratio	f/3.9
Lens Number	Triplet design
Back Focus	55mm（from the base of M48 male thread）
Weight	0.46kg
Rear-end thread type	M48×0.75 (M48×0.75 filter thread inside)

0.7x Reducer Size Diagram

0.7x Reducer Installation

Spot Diagram

Video

Images

Download

FRA400C Reducer User's Manual

2021-09-15

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