Vixen R130Sf N 130/650 Porta-II Telescope

Description

Designed for grab-and-go backyard stargazing and rich-field nebula sweeping, the Vixen R130Sf N 130/650 Porta-II Telescope is an intuitive manual alt-azimuth newtonian reflector telescope package. Operating at an f/5.0 focal ratio with a 650mm focal length, this 130mm (5.12 in) clear aperture instrument delivers a 0.89 arcseconds theoretical resolving power and reaches magnitude 12.3, gathering light for open cluster observation, extended nebulae scanning, and lunar exploration.

The optical system features a parabolic primary mirror made from low-expansion borosilicate optical glass, treated with aluminized coatings yielding 88-90% reflectivity and protected by an SiO2 overcoat, maintaining a 31% central obstruction by diameter (9.6% by area) from its 40mm secondary mirror. Measuring 575mm in length with a 160mm outer tube diameter, the tube assembly supplies a 28mm visual image circle. Supported by a 1.25-inch single-speed rack-and-pinion focuser with an integrated T-2 camera thread, this 4.00 kg (8.82 lbs) optical tube attaches to an included Porta II manual alt-azimuth mount featuring a friction clutch system, dual 360-degree slow-motion worm gears, and an aluminum tripod for a total system weight of approximately 9.8 kg.

Key Features of Vixen R130Sf N 130/650 Porta-II Telescope

Built for observers seeking rapid deployment without complex polar alignment, this 130mm Newtonian pairs a fast f/5.0 optical tube with Vixen’s heavy-duty Porta II mount. Two Plössl NPL eyepieces, slow-motion control handles, and a 6×30 finderscope deliver an out-of-the-box system for celestial sweeping.

• 130mm (5.12 in) clear aperture with 650mm focal length and fast f/5.0 optical speed
• Parabolic primary mirror made from low thermal expansion borosilicate optical glass
• Aluminized mirror coatings with silicon dioxide protective overcoat (88-90% reflectivity)
• Moderate central obstruction of 31% by diameter (9.6% by area) for balanced image contrast
• 1.25-inch rack-and-pinion focuser with integrated external T-2 thread for camera adapters
• Porta II manual alt-azimuth mount with friction clutch system and aluminum tripod
• Dual slow-motion worm gears providing continuous 360-degree tracking in altitude and azimuth
• Optical 6×30 finderscope and Plössl NPL 20mm and NPL 6.3mm eyepieces included

Wide-Field Newtonian Optical Train & Parabolic Clarity

Operating at an f/5.0 focal ratio, the parabolic optical train provides wide-field views of extended star clouds while eliminating chromatic aberration. The all-reflective mirror surfaces maximize photon transmission on faint nebulae, supporting practical visual magnifications from 18.6x up to 260x.

Porta II Manual Alt-Azimuth Mount & 360-Degree Worm Gears

Navigating the night sky is managed through the Porta II alt-azimuth mount, featuring full-circle worm gears that eliminate axis locking clamps. Observers can move the telescope by hand and engage the slow-motion control handles for fine centering, while the friction clutch holds the telescope securely at any aimed position.

• Porta II alt-azimuth mount with friction clutch system for immediate manual target acquisition
• Continuous 360-degree slow-motion worm gear drives on both altitude and azimuth axes
• Aluminum tripod with integrated accessory tray providing rigid field observing stability

Vixen Porta II Complete Telescope System 5-Year Warranty

The Vixen R130Sf N 130/650 Porta-II Telescope is backed by a 5-year limited warranty against material and manufacturing defects. The complete factory package contains the R130Sf Newtonian OTA, Porta II alt-azimuth mount head, aluminum tripod with accessory tray, dual slow-motion handles, 6×30 optical finderscope, and Plössl NPL 20mm and NPL 6.3mm eyepieces.