CHF 139
In stock with supplier
Visit Askar 60F 0.75× Reducer is a focal reducer specially designed for telescopes. Askar 60F Flat-Field. Compact, lightweight and powerful, this accessory transforms the astrograph into an even faster and more suitable system for wide-field imaging of the deep sky.
Thanks to its 0.75×, the telescope to a focal ratio of f/5.1, with advanced field correction to preserve fine, homogeneous stars even in the corners of modern Full Frame sensors.
The enlarged photographic field and reduced exposure times make this reducer particularly interesting for nomadic astrophotographers and wide-field imaging enthusiasts.
Once installed on the Askar 60F, the reducer reduces the native focal length:
This reduction brings several important benefits:
The reducer is particularly suitable for :
The Askar 60F 0.75× Reducer does more than just shorten the focal length. It also incorporates a field correction to effectively limit field curvature and preserve excellent star quality across the entire sensor.
This design guarantees :
The supported image circle reaches 44 mm, This makes it easy to use with full-format 24×36 mm sensors.
The reducer is based on an optical formula with three lenses specifically optimized to work with the Askar 60F.
This formula covers :
The result is a clean, well-corrected photographic field, perfectly suited to modern wide-field astrophotography.
The Askar 60F 0.75× Reducer adopts a standard backfocus of 55 mm measured from M48 male thread.
This distance greatly facilitates integration with :
The photographic tube supplied with the Askar 60F includes :
Installation of the gearbox is therefore quick, simple and particularly intuitive.
The reducer incorporates a standard thread M48x0.75 compatible with 2-inch astronomical filters.
This compatibility allows direct mounting of :
This approach greatly simplifies optical train design and reduces the need for additional adapters.
The Askar 60F 0.75× Reducer benefits from precision CNC manufacturing ensuring :
With only 0.2 kg, yet it remains perfectly suited to nomadic setups and lightweight frames.
The gearbox is supplied with front and rear threaded metal plugs to protect the optical surfaces from dust during storage and transport.
Both ends are threaded M50x1, guaranteeing :
This design helps maintain consistent image quality even with modern high-resolution sensors.
| Features | Value |
|---|---|
| Compatibility | Askar 60F Flat-Field |
| Reduction factor | 0.75× |
| Resulting focus | 311 mm |
| Resulting focal ratio | f/5.1 |
| Optical type | Triplet corrector/reducer |
| Image circle | 44 mm Full Frame |
| Backfocus | 55 mm from M48 male thread |
| Main thread | M50x1 |
| Compatible adapters | M54x0.75 and M48x0.75 |
| Filter compatibility | Integrated 2″ M48 filter thread |
| Weight | 0.2 kg |
| Manufacturing | High-precision CNC aluminum |
The Askar 60F 0.75× Reducer is an excellent complement for astrophotographers wishing to maximize the wide-field capabilities of their Askar 60F.
By transforming the refractor into a fast astrograph at f/5.1, while retaining excellent Full Frame correction, this reducer greatly improves photographic speed and ease of use.
Its optimized optical design, compact mechanics and perfect compatibility with the 60F make it a particularly interesting accessory for nomadic setups and modern wide-field astrophotography.
