GSO 4.5-inch F/12 M-CRF Classical Cassegrain – Carbon Fiber Telescope OTA

GSO 4.5-inch F/12 M-CRF Classical Cassegrain – Carbon Fiber Telescope OTA

The GSO 4.5-inch (114mm) F/12 M-CRF Classical Cassegrain Carbon Telescope OTA is a premium optical tube designed for astronomers who demand exceptional sharpness and contrast in a compact, lightweight form. Using the classical Cassegrain optical layout with parabolic primary and hyperbolic secondary mirrors, this OTA delivers exceptional clarity that outperform typical Maksutov and Schmidt designs in the same aperture range.

Ideal for high-resolution planetary, lunar, double-star and solar (with filter) observing, this OTA is engineered for professional performance at an enthusiast-friendly price. The Carbon Fiber OTA ensures thermal stability, preventing focus shift as temperatures change—critical for astrophotography and precision visual observing.

Optical design: Cassegrain
Optical diameter: 114mm
Focal length: 1368mm
Focal ratio: F/12
Optics type: Hyperbolic & Parabolic mirror
Optics Material: BK7 Optical glass
Focuser: 2" dual-speed Crayford EAF complete
Mirror Separation: 248mm
Back Working Distance: 230mm
Astro-imaging capability: Lunar & planetary
Dovetail plate: V type
Tube material: Aluminum & Carbon fiber
Baffle: new Multiple knife-edge baffle system

Designed for High-Contrast Observing

The F/12 Classical Cassegrain design offers a longer focal length without the bulk of large refractors or catadioptrics. The result is:

✅ Razor-sharp planetary and lunar detail
✅ High contrast views with minimal optical aberrations
✅ Superior performance with high-power eyepieces

This makes the telescope ideal for:

• Planetary astrophotography

• Lunar imaging

• Solar observing (with appropriate solar filter)

• Double-star resolution

Premium Build Quality – Carbon Fiber OTA

Unlike traditional metal tubes that expand or contract with temperature changes, this GSO Classical Cassegrain uses Carbon Fiber, ensuring:

• Faster temperature stabilization

• Reduced focus drift

• Better rigidity at low weight

This is especially important for long observing sessions or imaging.

Available at Modern Telescopes

We are an authorized dealer for GSO (Guan Sheng Optical) in India, offering full after-sales support and fast domestic shipping.