What are the main benefits of the Askar 60F and 91F reducers?

By reducing the focal length to 0.75 times, you can achieve a brighter f-number and wider field of view, which allows for shorter exposure times. This makes it easier to photograph faint celestial objects like nebulae and star clusters.

What is the supported image circle size?

It supports a full-size image circle of 44mm.

Can filters be directly attached to the reducer?

Yes, the reducer has an M48x0.75 filter thread built into the adapter section, allowing you to attach filters without additional adapters.

What is the release date and expected market price?

The release date is May 22, 2026 (Friday), and the expected market price is around 30,000 yen including tax.

Where can I purchase it?

It will be available exclusively at specialty astronomical telescope stores and direct stores of Citron Japan Co., Ltd.

Sytrony Japan Launches '60F 0.75x Reducer' and '91F 0.75x Reducer' to Enhance Askar F-Series Performance

Published May 22, 2026 8:00 PM ・ Updated Jun 14, 2026 9:13 AM ・ 2 min read ・ Source: PR TIMES

Sytrony Japan will release specialized 0.75x reducers for the Askar 60F and 91F telescopes on May 22, 2026. These reducers shorten focal length by 0.75x, providing brighter optics and a wider field of view for easier imaging of nebulae and star clusters. They support full-frame sensors and include built-in filter mounts. Estimated market price is around 30,000 JPY each.

Sytrony Japan announced the release of the '60F 0.75x Reducer' (for Askar 60F) and the '91F 0.75x Reducer' (for Askar 91F), products from the Jiaxing Ruixing Optical Instrument brand 'Askar,' on May 22, 2026. By shortening the focal length of each telescope by 0.75x, these reducers allow for brighter f-ratios and a wider field of view, making the imaging of nebulae, star clusters, and faint deep-sky objects more efficient.

Key Features

- Specifically Designed 0.75x Reducers Optimized for each model, the 60F setup achieves 311mm f/5.1, while the 91F setup achieves 455mm f/5. Shortening the focal length widens the field of view, helping to reduce exposure times.

- Full-Frame Compatibility The optical system uses a 3-group, 3-element design and supports a 44mm full-frame image circle. Back focus is 55mm from the M48x0.75 connection point.

- Streamlined System Integration The reducer connects inside the existing extension tube provided with each telescope. The adapter section includes a built-in M48x0.75 filter thread.

FACT BOX

Source: PR TIMES
Category: New Product
Organizations: Jiaxing Ruixing Optical Instrument

Sytrony Japan Launches '60F 0.75x Reducer' and '91F 0.75x Reducer' to Enhance Askar F-Series Performance

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Key Features

FACT BOX

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