Tecnosky AP 72/432 ED FPL53 OTA

Description

Track wide-field open clusters and solar eclipse events with the Tecnosky AP 72/432 ED FPL53 OTA portable grab and go refractor optical tube assembly. Operating at a fast f/6.0 focal ratio with a 432mm focal length, this 72mm (2.83 in) aperture telescope delivers a 1.61 arcseconds theoretical resolving power and reaches magnitude 12.0, collecting photons efficiently for high-resolution travel astrophotography and wide-field rich-field visual scanning.

The optical system utilizes an air-spaced extra-low dispersion doublet treated with broadband fully multi-coated (FMC) transmission layers and an unobstructed 0% central profile. Housed in an aluminum chassis with a 90mm outer dew shield diameter, the tube measures 335mm retracted and 390mm extended, providing 145mm of back focus measured from the 2-inch visual adapter (55mm standard from dedicated M48 flattener threads). Supported by a 2.5-inch dual-speed rack-and-pinion focuser with an M63x1 thread and field rotator, this 2.30 kg (5.07 lbs) refractor covers a 44mm full-frame circle when matched to dedicated optical correctors.

Portable Travel Astrograph Specifications

Built for mobile deep-sky imaging and eclipse chasing, this 72mm doublet pairs an Ohara FPL-53 element with a rotatable 2.5-inch rack-and-pinion focuser. Its compact aluminum body, CNC-machined split tube rings, and custom padded hard case provide dependable transport for dark-sky expeditions.

• 72mm (2.83 in) clear aperture with 432mm focal length and fast f/6.0 optical speed
• Air-spaced ED doublet objective featuring Ohara FPL-53 and lanthanum glass
• Broadband fully multi-coated (FMC) optical layers with 0% central obstruction
• 2.5-inch dual-speed rack-and-pinion focuser 1:10 with M63x1 camera thread and field rotator
• Generous 145mm back focus distance measured from the 2-inch visual adapter
• Corrected 44mm full-frame image circle when paired with dedicated flatteners or reducers
• CNC-machined tube rings with standard 44mm Vixen dovetail bar and retractable dew shield
• Step-down 2-inch to 1.25-inch adapter and custom padded hard case included

Ohara FPL-53 Wavefront Precision & Optical Contrast

The combination of Ohara FPL-53 Super ED glass and a high-refraction lanthanum mating element suppresses secondary spectrum chromatic aberration, producing sharp star points and crisp lunar terminator views. The unobstructed optical train preserves natural color contrast across visual magnifications from 10.3x up to 144x.

Flexure-Free Focus Control & Transit Case Protection

Astrophotography with dedicated camera trains requires smooth, flexure-free focus adjustments. The Tecnosky 72/432 ED features a 2.5-inch rack-and-pinion focuser with 1:10 micro-reduction, direct M63x1 threads, and a 360-degree field rotator for framing target compositions. Housed inside a custom padded hard case, this 2.30 kg optical tube assembly remains protected during travel.

• 2.5-inch dual-speed rack-and-pinion focuser with direct M63x1 threaded camera coupling
• Built-in 360-degree camera field rotator for balanced photographic composition
• Custom padded hard storage case providing impact protection during remote field expeditions

Travel Doublet Series Factory Coverage & Contents

The Tecnosky AP 72/432 ED FPL53 OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 72/432 ED optical tube assembly, retractable dew shield, CNC-machined tube rings, a Vixen-style dovetail bar, 2-inch to 1.25-inch adapter, and a custom padded hard case.