Tecnosky SLD 130/900 V2 OTA

Description

Resolve fine Jovian cloud belts and split close binary stars using the Tecnosky SLD 130/900 V2 OTA apochromatic triplet refractor telescope optical tube assembly. Operating at an f/6.92 focal ratio with a 900mm focal length, this 130mm (5.12 in) clear aperture instrument achieves a 0.89 arcseconds diffraction-limited resolving power and reaches magnitude 13.3, gathering photons for high-resolution deep-sky astrophotography, lunar video capture, and reference-grade visual planetary inspection.

The optical system utilizes an air-spaced Super APO triplet configuration treated with broadband fully multi-coated (FMC) anti-reflection layers and an unobstructed 0% central profile. Built inside an aluminum chassis measuring 810mm retracted and 960mm extended with a 168mm outer dew shield diameter, the tube assembly supplies 170mm of mechanical backfocus measured from the rear mechanical thread. Equipped with an oversized 3.7-inch dual-speed rack-and-pinion focuser and an integrated 360-degree field rotator, this 11.00 kg (24.25 lbs) optical tube illuminates a 44mm full-frame image circle when paired with dedicated correctors or reducers.

Key Features of Tecnosky SLD 130/900 V2 OTA

Designed for permanent observatory installations and heavy-duty field platforms, this 130mm Super APO triplet pairs an Ohara FPL-51 center lens with lanthanum mating glass and a massive 3.7-inch rack-and-pinion focuser. CNC-machined split tube rings, a top utility handle, and an aluminum flight case provide rigid support for demanding imaging trains.

• 130mm (5.12 in) clear aperture with 900mm focal length and f/6.92 optical speed
• Air-spaced Super APO triplet objective with Ohara FPL-51, lanthanum, and low-dispersion glass
• Broadband fully multi-coated (FMC) optical surfaces with 0% central obstruction
• 3.7-inch heavy-duty dual-speed rack-and-pinion focuser 1:10 with 360-degree field rotator
• Generous 170mm mechanical back focus distance measured from rear mechanical thread
• Corrected 44mm full-frame image circle when paired with dedicated flattener or reducer
• CNC-machined tube rings with 44mm Vixen-style dovetail bar and top carrying handle
• Step-down 2-inch and 1.25-inch adapters and rugged aluminum flight case included

Ohara FPL-51 & Lanthanum Super APO Optics

Combining an Ohara FPL-51 ED center lens with high-index lanthanum and special low-dispersion glass elements controls secondary chromatic aberration across red, green, and blue wavelengths. The unobstructed 130mm optical path preserves high contrast on low-contrast planetary features, supporting practical magnifications from 18.6x up to 260x.

Heavy-Duty 3.7-Inch Drawtube & 360-Degree Rotation

Supporting large-format monochrome cameras, filter wheels, and off-axis guiders requires drawtube rigidity without mechanical flexure. The 3.7-inch rack-and-pinion focuser incorporates a 1:10 micro-reduction drive for fine focal control, alongside a 360-degree manual rotator for sensor framing. Transported in an aluminum flight case, this 11.00 kg optical tube assembly remains protected during transit.

• Oversized 3.7-inch rack-and-pinion focuser with 1:10 micro-reduction to prevent imaging drawtube flexure
• Integrated 360-degree field rotator for framing celestial targets without unthreading equipment
• Custom aluminum hard flight case providing structural protection for field and observatory transport

Tecnosky SLD Series Warranty & Inclusions

The Tecnosky SLD 130/900 V2 OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 130/900 SLD V2 OTA, retractable dew shield, CNC tube rings, Vixen-style dovetail bar, top handle, 2-inch and 1.25-inch adapters, and an aluminum flight case.