Cassegrain Telescope 154mm F/12 OTA

Cassegrain telescope 154mm f/12 OTA for astrophotography and visual observation is designed for enthusiasts of contrast, resolution, and compact precision. With an aperture of 154 mm and a focal length of 1848 mm, this classic Cassegrain delivers exceptional sharpness at high magnification – ideal for observing and photographing planets, double stars, and lunar craters.

Thanks to the closed design, the optics remain clean, stable, and collimation-proof. The long focal length makes this telescope particularly suitable for balcony use or permanent setups where you want high magnification despite limited movement space.

✓ Classic Cassegrain design: sharpness, contrast, and no chromatic aberration
✓ f/12 focal ratio – perfect for lunar and planetary detail
✓ Closed tube – resistant to dust, temperature fluctuations, and miscollimation
✓ Lightweight and compact – easier to handle than long refractors
✓ Works excellently with small CMOS cameras for high-res lucky imaging

This telescope suits observers who prefer serious magnification without bulky tubes. Combine it with a 2x barlow and an ASI camera, and you’re ready to capture details on Jupiter, Saturn, or Mars with impressive precision.

Application

• High magnification for planetary and lunar photography
• Visual observation of double stars and crater detail
• Ideal for use from balcony or fixed observation point
• Compact alternative to 100-120 mm refractors with long focal length

What You Can See

✓ Saturn’s rings, cloud structures on Jupiter
✓ Craters, rilles, and shadow transitions on the moon
✓ Superb separation of close double stars (<1″)
✓ Planetary nebulae with enhanced contrast
✓ Suitable for lucky imaging of Mars, Venus, or the moon

Filters / Features

• Telescope type: Reflector
• Design: Classic Cassegrain
• Lens diameter: 154 mm
• Focal length: 1848 mm
• Focal ratio: f/12
• Focuser: 2″ rear connection (often without built-in focuser)
• Usage type: Planetary photography / visual high-res
• Mount connection: Vixen-style dovetail
• Suitable for beginners: ✗
• Suitable for advanced users: ✓
• Suitable for observatories: ✓ (as compact specialist)

Technical Specifications

• Mirror design: classic Cassegrain
• Primary mirror: parabolic
• Secondary mirror: hyperbolic
• Coating: Alu + SiO₂
• Tube length: approx. 500 mm
• Weight: ± 5.5-6.5 kg
• Focuser: optional (often via adapter)
• Includes: dust cap, dovetail
• Collimation-proof closed system
• Mount: not included