Vixen ED80Sf AP 80/600 OTA

Description

Capture wide-field deep-sky emission nebulae and crisp planetary vistas with the Vixen ED80Sf AP 80/600 OTA apochromatic doublet refractor optical tube assembly. Operating at an f/7.5 focal ratio with a 600mm focal length, this 80mm (3.15 in) clear aperture telescope delivers a 1.45 arcseconds theoretical resolving power and reaches magnitude 11.3, collecting photons efficiently for color-free planetary visual observation, double-star splitting, and prime-focus astrophotography.

The optical system features an air-spaced extra-low dispersion doublet objective combining an Ohara FPL-53 element with high-index crown glass, treated with multi-coated anti-reflection layers with an unobstructed 0% central profile. Built inside an aluminum chassis measuring 570mm in length with a 100mm outer tube diameter, the tube assembly supplies 135mm of back focus from the rear 2-inch drawtube. Supported by a 2-inch Crayford focuser with dual knobs, mechanical tension control, and a direct T-thread camera interface, this 3.40 kg (7.50 lbs) optical tube illuminates a 44mm full-frame image circle when paired with optional correctors.

Key Features of Vixen ED80Sf AP 80/600 OTA

Designed as a versatile optical tube assembly for existing mount saddles, this 80mm apochromat combines an Ohara FPL-53 doublet with a smooth Crayford focuser. Tube mounting rings, a standard Vixen dovetail bar, an optical 9×50 finderscope, two Plössl eyepieces, a flip mirror, and an aluminum flight case deliver an adaptable observing platform.

• 80mm (3.15 in) clear aperture with 600mm focal length and versatile f/7.5 optical speed
• Air-spaced ED doublet objective featuring Ohara FPL-53 and high-index crown optical glass
• Multi-coated optical layers delivering high light transmission with 0% central obstruction
• 2-inch Crayford focuser with tension control and direct T-thread external camera coupling
• Generous 135mm back focus distance measured from the rear 2-inch drawtube
• Corrected 44mm full-frame image circle when paired with optional reducer or flattener
• Tube mounting rings with standard 44mm Vixen-style dovetail mounting bar
• Optical 9×50 finderscope, dual-port flip mirror diagonal, and aluminum flight case included

Air-Spaced FPL-53 Doublet & Secondary Spectrum Control

Pairing an Ohara FPL-53 Super ED center lens with high-refraction crown glass controls chromatic dispersion, eliminating distracting false-color fringing on bright lunar rims and planets. The unobstructed 80mm optical train preserves fine image contrast, supporting practical visual magnifications from 11.4x up to 160x.

Two-Inch Crayford Drawtube & Dual-Port Flip Mirror Diagnostics

Smooth, backlash-free focusing is provided by a 2-inch Crayford drawtube with adjustable tension control to prevent slip under heavy accessory payloads. The included dual-port flip mirror diagonal allows observers to switch instantly between a 1.25-inch eyepiece and a camera attached to the direct T-thread port, while the fitted aluminum flight case protects the assembly during transit.

• 2-inch Crayford focuser with tension adjustment to eliminate drawtube slip under accessory loads
• Integrated dual-port flip mirror diagonal for instant switching between visual and imaging setups
• Custom aluminum flight case providing rigid structural protection during field transport

Vixen ED Refractor Series Five-Year Warranty Coverage

The Vixen ED80Sf AP 80/600 OTA is backed by a 5-year limited warranty against material and manufacturing defects. The complete factory package contains the ED80Sf optical tube assembly, tube mounting rings, Vixen dovetail bar, 9×50 optical finderscope, dual-port flip mirror diagonal, Plössl NPL 20mm and NPL 6.3mm eyepieces, and an aluminum flight case.