Explore Scientific 3-Inch Field Flattener 0.7x Focal Reducer

Elevate your astrophotography with the Explore Scientific 3-Inch Field Flattener 0.7x Focal Reducer – a versatile accessory correcting edge-of-field aberrations and reducing your f-ratio by 0.7.

Ideal for 127mm and 152mm refracting telescopes, excluding doublet refractors, it features fully multi-coated optics for optimal image quality.

This accessory threads onto the Explore Scientific 2-inch rack-and-pinion focuser, and for telescopes with a 2.5-hex focuser, an additional adapter is required.

Offering 55mm of back focus, plus 3mm with the M42x0.75 adapter, ensuring precise sensor placement at 52mm from the adapter's face.

For compatibility with the 2.5 hex focuser, consider item number 510366.

Originally designed for the f/8 system, user experiences and subsequent testing confirm excellent performance with f/7.5 refractors.

Redefine your astrophotography possibilities with this comprehensive field flattener/focal reducer.

Features: 

• Versatile Functionality: The Explore Scientific 3-Inch Field Flattener 0.7x Focal Reducer serves as a field flattener and focal reducer, enhancing astrophotography versatility.

• Aberration Correction: Effectively corrects edge-of-field aberrations caused by curved focal planes, ensuring crisp and true images during observations.

• Focal Ratio Reduction: Reduces the f-ratio by 0.7, providing a wider field of view, brighter images, and minimizing exposure time for enhanced astrophotography.

• Telescope Compatibility: Recommended for 127mm and 152mm refracting telescopes (excluding doublet refractors), showcasing its adaptability to various telescope models.

• Fully Multi-Coated Optics: Boasts fully multi-coated optics, guaranteeing optimal light transmission and high-contrast images.

• Threaded Attachment: Easily threads onto the Explore Scientific 2-inch rack-and-pinion focuser, ensuring a secure and stable connection during observations.

• Back Focus Precision: Offers 55mm of back focus, with the M42x0.75 adapter adding 3mm, allowing precise sensor placement at 52mm from the adapter's face.

• Compatibility Adapter: To connect to the 2.5 hex focuser, purchase item number 510366, enhancing compatibility and user convenience.

• Optimal Performance: Originally designed for f/8 systems, user experiences and testing confirm excellent performance with f/7.5 refractors, showcasing its adaptability and effectiveness across different systems.

Specifications: