Askar 0.75x Reducer for 60° Flatfield Apo

This reducer shortens the focal length of the Askar 60F by a factor of 0.75x, significantly reducing exposure time in astrophotography.

The reducer is designed for the Flatfieldapo 60F.

The focal length is reduced to 311 mm.

The aperture ratio is improved from f/6.8 to f/5.1.

A triplet design with ED glass ensures high field quality.

The reducer is screwed onto the M50x1 thread of the apochromatic refractor's extension.

The camera-side connection is M48x0.75 (via adapter).

The working distance from the M48 thread is 55 mm.

M48x0.75 thread for 2" filters in the adapter.

Askar 0.75x Reducer for 60F Flat-Field Apochromatic Refractor
The focal reducer shortens the focal length of the flat-field apochromatic refractor from 408 mm to 311 mm. Field correction is maintained. Exposure times are reduced by approximately 56%. The reduction factor increases the field of view, making the apochromatic refractor even more appealing for wide-field applications. This is especially true when working with smaller sensors. The 0.75x reducer is a true alternative to an additional telescope or camera lens.

Type: Focal reducer
Suitable for: Askar 60F Flatfield APO
Reduction factor: 0.75x
Optical design: Triplet with ED glass
Connection on both sides: M50x1 thread
Camera connection: M48x0.75 (via adapter)
Working distance: 55 mm from the M48 thread
Filter connection: M48x0.75 thread for 2" filters in the adapter
Weight: 0.2 kg

Focal reducer
Dust caps