Vixen SD115S AP 115/890 Sphinx SXP2 Starbook Ten GoTo

Description

Engineered with pulse stepper motors and belt-driven GoTo tracking, the Vixen SD115S AP 115/890 Sphinx SXP2 Starbook Ten GoTo is a flagship computerized equatorial apochromatic refractor telescope package. Operating at an f/7.7 focal ratio with an 890mm focal length, this 115mm (4.53 in) clear aperture instrument delivers a 1.01 arcseconds theoretical resolving power and reaches magnitude 12.1, providing high optical throughput for high-precision computerized astrophotography and color-free lunar and planetary video imaging.

The optical system features an air-spaced Super Low Dispersion doublet objective pairing an FPL-53 Super ED element with eco-friendly mating glass, treated with ultra-wideband fully multi-coated broad-band layers with an unobstructed 0% central profile. Built inside an aluminum chassis measuring 930mm in length with a 125mm outer tube diameter, the tube assembly supplies 145mm of back focus from the rear mechanical thread (63.5mm from the M60 thread on optional Flattener HD optics). Supported by a 2-inch heavy-duty rack-and-pinion focuser with direct T-thread and M60 interfaces, this 4.40 kg (9.70 lbs) OTA mounts to an included Sphinx SXP2 computerized German equatorial GoTo mount with pulse stepper motors, belt drive, a STAR BOOK TEN controller, and an SXG-HAL130 tripod for a total system weight of approximately 27.0 kg.

Key Features of Vixen SD115S AP 115/890 Sphinx SXP2 Starbook Ten GoTo

Built for automated observatory-grade astro-imaging and planetary observation, this 115mm apochromatic refractor pairs FPL-53 optics with Vixen’s flagship Sphinx SXP2 equatorial mount. The high-definition color STAR BOOK TEN hand controller, pulse motor belt-drive system, illuminated 7×50 finderscope, and dual-port flip mirror provide an automated observing platform.

• 115mm (4.53 in) clear aperture with 890mm focal length and versatile f/7.7 optical speed
• Air-spaced SD doublet objective utilizing FPL-53 Super ED glass and eco-friendly mating glass
• Ultra-wideband fully multi-coated broad-band anti-reflection optics with 0% central obstruction
• 2-inch heavy-duty rack-and-pinion focuser with tension control and direct T-thread/M60 interface
• Generous 145mm back focus distance from rear mechanical thread (63.5mm from Flattener HD)
• Corrected 44mm full-frame flat field image circle when paired with optional HD correctors
• Sphinx SXP2 GoTo mount with pulse stepper motors, belt drive, and STAR BOOK TEN controller
• SXG-HAL130 heavy aluminum tripod, counterweights (3.7 kg and 1.9 kg), and 7×50 illuminated finder included

Color-Free SD Objective & Wavefront Transmission

The doublet objective pairs an FPL-53 Super ED element with precision Eco-Glass to eliminate secondary spectrum chromatic aberration across visible wavelengths. The unobstructed 115mm clear aperture preserves natural contrast on fine planetary discs and lunar terminator details, supporting practical visual magnifications from 16.4x up to 230x.

Sphinx SXP2 Belt-Drive Mechanics & STAR BOOK TEN Controller

High-precision tracking and slewing are delivered through the Sphinx SXP2 mount, utilizing pulse stepper motors driven by timing belts to eliminate gear backlash and mechanical vibration. The STAR BOOK TEN hand controller features a high-definition color star-chart display with extensive deep-sky catalogs, while the 4.40 kg optical tube clamps securely via heavy tube rings and a top handle onto the mount’s rigid saddle.

• Sphinx SXP2 mount with pulse motor belt-drive system for smooth tracking and zero gear backlash
• STAR BOOK TEN high-definition color controller offering intuitive star-chart navigation and GoTo commands
• Heavy-duty aluminum tube rings with top carrying handle for balanced mount transport

Vixen SXP2 Flagship Observatory Outfit 5-Year Warranty

The Vixen SD115S AP 115/890 Sphinx SXP2 Starbook Ten GoTo is backed by a 5-year limited warranty against material and manufacturing defects. The complete factory package contains the SD115S apochromat OTA, SXP2 equatorial GoTo head, STAR BOOK TEN color controller, SXG-HAL130 tripod, counterweights (3.7 kg and 1.9 kg), 7×50 illuminated optical finderscope, dual-port flip mirror diagonal, tube rings, and a dovetail bar.