Explore Scientific 127mm f/7.5 FCD100 Carbon-Fiber Triplet APO Refractor OTA (FCD100-127075-CF-01)

The Explore Scientific 127mm f/7.5 FCD100 Carbon-Fiber Triplet APO Refractor is a premium optical tube engineered for advanced astrophotography and high-contrast visual astronomy. Using air-spaced triplet optics made from HOYA FCD100 ED glass, this telescope delivers exceptional color correction, razor-sharp star images, and high resolution across the entire field.

The lightweight carbon-fiber tube minimizes thermal expansion and enhances focus stability during long imaging sessions—making it ideal for astro-imagers working through temperature changes. Paired with the precision 3" HEX rack-and-pinion focuser, this OTA supports heavy cameras, filter wheels, and flatteners without flexure.

With its combination of premium glass, carbon construction, and mechanical stability, the FCD100 127mm CF is one of the most capable mid-aperture refractors available for serious astrophotographers.

Key Features

• HOYA FCD100 ED glass with air-spaced triplet design for world-class color correction

• Lightweight carbon-fiber optical tube for thermal stability and portability

• 127mm aperture, excellent for deep-sky imaging and high-resolution lunar/planetary work

• 952mm focal length (f/7.5) ideal for galaxies, nebulae, clusters, and widefield detail

• 3" HEX focuser supports large sensors and heavy imaging gear

• Retractable dew shield with precision CNC tube rings

• Vixen-style dovetail included

• Built for astrophotography, but also outstanding for visual observing

Specifications