William Optics Fluorostar 132

132mm f/6.9 FPL-53 Triplet: Pure Color Correction

At the core of the Fluorostar 132 is a three-element objective lens featuring FPL-53 glass, the gold standard for color error correction. This apochromatic design virtually eliminates chromatic aberration, ensuring there is no spurious purple or green fringing around bright stars like Vega or on the limb of Jupiter. With high-transmission STM coatings, the FLT132 delivers exceptionally high contrast, revealing subtle planetary details and rendering stars as sharp, color-pure points against a black-sky background.

3.7" Rack & Pinion Focuser: 360° of Imaging Precision

Designed for the demands of modern astrophotography, the FLT132 is equipped with a heavy-duty 3.7" rack and pinion focuser. This large-aperture focuser can carry heavy imaging trains—including large-format cameras, filter wheels, and off-axis guiders—without sagging or flexure. For perfect composition, the entire focuser assembly rotates a full 360 degrees, allowing you to frame targets like the North American Nebula (NGC 7000) exactly as you wish without ever loosening your camera.

A Robust 132mm OTA with CNC-Machined Precision

The optical tube is crafted from solid CNC-machined aluminum, providing a rigid and thermally stable platform essential for consistent focus through long imaging sessions. The powder-painted white tube is durable and presents a classic, clean aesthetic. Every Fluorostar 132 includes a high-quality soft carrying case, protecting your investment during transport to dark-sky sites and making this powerful 132mm refractor surprisingly manageable.

FLT132 vs. Standard 130mm Refractors: The 3.7" Focuser Advantage

While many refractors in the 130mm class deliver excellent optical views, the Fluorostar 132 sets itself apart with its imaging-centric design, most notably its focuser.

• Typical Refractors: Many competitors use 2.5" or 3" focusers, which are adequate for smaller sensors but can become a bottleneck for flexure and illumination with larger cameras.
• Fluorostar 132: The 3.7" focuser provides a wider, unvignetted light path for full-frame and larger sensors, especially when paired with a compatible reducer or flattener. Its robust build quality means you can invest in a heavy imaging setup without needing to budget for an immediate focuser upgrade.