Airy Disk APO 204mm f/7 Triplet ED FK61 Apochromatic Refractor APO

Observatory-Class Performance

Step into the realm of professional astronomy with the Airy Disk APO 204mm f/7 Triplet ED FK61, a massive refractor designed for uncompromising optical performance. With a commanding 204mm (8-inch) aperture, this instrument delivers extraordinary brightness, resolution, and contrast—unlocking deep-sky structures and planetary details that smaller refractors simply cannot match.

Its triplet apochromatic lens system uses high-quality FK61 ED glass, delivering strong chromatic correction, impressive contrast, and pin-point star images across the field. Combined with its f/7 focal ratio, the 204mm APO is a superb choice for advanced astrophotographers capturing detailed galaxies, nebulae, and high-definition planetary images.

This refractor is built to perform in observatory environments, serious backyard setups, and advanced imaging platforms. Its robust construction, precision focuser, and professional-grade optics make it one of the most capable refractors available in its class.

Perfect for:

• Observatory-level astrophotography

• High-resolution planetary imaging

• Deep-sky imaging with maximum detail and contrast

• Advanced users seeking an 8-inch APO refractor

Key Features:

• 204mm aperture for unmatched resolution and image brightness

• Triplet APO design with ED FK61 glass

• f/7 focal ratio optimized for high-detail imaging

• Built for professional and advanced amateur setups

• Superior contrast, clarity, and color correction

This is a refractor for astronomers who expect nothing less than exceptional. The 204mm APO is a true flagship instrument, capable of delivering observatory-level results from your own sky.

Specifications: