Askar 80PHQ 0.76x Full Frame Reducer

Product Overview

The Askar 80PHQ 0.76x Full Frame Reducer is a dedicated 3-inch reducer designed specifically for the Askar 80PHQ f/7.5 astrograph. Its triplet optical design reduces the native 80PHQ system by 0.76x, changing the telescope to approximately f/5.7 with a reduced focal length of 456mm.

This accessory is built for deep-sky astrophotographers who want a wider field of view and shorter exposure times while keeping the 80PHQ as the core imaging platform.

Who Is This Product Best For?

This reducer is best for Askar 80PHQ owners who use their telescope primarily for astrophotography. It is especially useful for beginner-to-advanced deep-sky imagers who want to capture larger nebulae, wide star fields, and extended objects with a faster optical system than the native f/7.5 configuration.

Why Choose This Product?

• Dedicated reducer for the Askar 80PHQ astrograph.
• 0.76x reduction changes the 80PHQ from f/7.5 to approximately f/5.7.
• Reduces focal length to approximately 456mm for a wider imaging field.
• Helps shorten exposure time for deep-sky astrophotography.
• Uses a 3-inch triplet reducer design for full-frame imaging support.
• Standard 55mm back focus simplifies camera spacing for common astronomy imaging setups.
• Built-in M48x0.75 2-inch filter thread supports convenient filter installation.

Recommended Uses

• Wide-field deep-sky astrophotography with the Askar 80PHQ
• Large nebula and star-field imaging
• Full-frame camera imaging with the 80PHQ
• Shorter exposure imaging compared with the native f/7.5 configuration
• Portable and semi-permanent imaging rigs using the 80PHQ

Compatibility and Accessory Notes

This reducer is designed specifically for the Askar 80PHQ. When used with the 80PHQ f/7.5 astrograph, it provides a reduced focal ratio of approximately f/5.7 and a reduced focal length of approximately 456mm. The vendor specifies a standard 55mm back focus, and the reducer includes a built-in M48x0.75 2-inch filter thread.

The reducer connects through the 80PHQ photographic adapter system at the focuser end. Camera adapters, spacers, filters, filter drawers, and cameras are sold separately unless specifically included in a bundle.

Important Limitations

• This is not a standalone imaging lens or telescope.
• It is designed for the Askar 80PHQ and should not be assumed compatible with other telescopes.
• It is for astrophotography, not visual observing.
• Accurate 55mm camera-side back focus is required for best field correction.
• It will not turn the 80PHQ into a high-magnification planetary telescope; it widens the field and speeds up deep-sky imaging.

Frequently Asked Questions

Is this reducer good for beginners?

Yes, if the user already owns an Askar 80PHQ and understands basic camera spacing. The standard 55mm back focus is familiar for many astronomy camera setups, but spacing still needs to be measured carefully.

What is it best used for?

It is best used for wide-field deep-sky astrophotography with the Askar 80PHQ, especially when a faster focal ratio and wider field are preferred.

Is it for visual observing or astrophotography?

This is an astrophotography accessory. It is not recommended as a visual observing accessory.

What telescope is it compatible with?

It is specifically designed for the Askar 80PHQ astrograph.

What camera spacing does it require?

The vendor specifies a standard 55mm back focus.

Does it accept filters?

Yes. It includes a built-in M48x0.75 2-inch filter thread.

When should it not be recommended?

Do not recommend it to customers who do not own an 80PHQ, need a visual accessory, or want to increase focal length for small targets.

Our Recommendation

Ontario Telescope recommends the Askar 80PHQ 0.76x Full Frame Reducer for 80PHQ owners who want to make their imaging system faster and wider without changing telescopes. It solves the problem of capturing larger deep-sky targets more efficiently. Choose the native 80PHQ configuration instead when more focal length and smaller image scale are preferred.

Optical Diagram Reports

The following vendor-supplied graphic provides reducer information and specifications for the Askar 80PHQ imaging setup.