TS Optics Photoline AP 140/910 ED Triplet OTA

Description

Operating at a 910mm focal length with 0.83 arcseconds theoretical resolving power, the TS Optics Photoline AP 140/910 ED Triplet OTA is a flagship apochromatic triplet refractor telescope optical tube assembly. Sized with an unobstructed 140mm (5.51 in) clear aperture and an f/6.5 focal ratio, this instrument gathers light to visual magnitude 13.4, collecting photons for observatory-grade deep-sky astrophotography, high-resolution lunar and planetary surface observation, and faint star cluster auditing.

The optical system features an air-spaced Super APO triplet objective mounted in a CNC temperature-compensated lens cell, treated with ultra-wideband anti-reflection multi-coatings tested to a Strehl ratio of 0.95 or higher with an unobstructed 0% central profile. Built inside an aluminum chassis measuring 800mm retracted and 940mm extended with a 172mm outer dew shield diameter, the tube supplies 185mm of back focus from the rear mechanical thread. Supported by a 3.7-inch heavy-duty dual-speed rack-and-pinion focuser with M92 and M68 threads and a 360-degree field rotator, this 11.20 kg (24.69 lbs) refractor illuminates a 44mm full-frame image circle when paired with dedicated correctors.

Key Features of TS Optics Photoline AP 140/910 ED Triplet OTA

Engineered for demanding observatories and high-resolution planetary imaging, this 140mm triplet refractor couples an Ohara FPL-53 element with a massive 3.7-inch rack-and-pinion focuser. Heavy-duty CNC tube rings, a 75mm Losmandy-style dovetail bar, a top handle, and an aluminum flight case provide rigid mechanical support under heavy loads.

• 140mm (5.51 in) clear aperture with 910mm focal length and fast f/6.5 optical speed
• Air-spaced Super APO triplet objective with Ohara FPL-53 and German Schott optical glass
• Ultra-wideband multi-coatings with Strehl ratio of 0.95 or higher and 0% central obstruction
• 3.7-inch heavy-duty dual-speed rack-and-pinion focuser 1:10 with M92/M68 threads and rotator
• Generous 185mm mechanical back focus distance measured from rear mechanical thread
• Corrected 44mm full-frame image circle when paired with dedicated flattener or reducer
• Heavy-duty CNC tube rings with 75mm Losmandy-style dovetail bar and top carrying handle
• Retractable dew shield, 2-inch and 1.25-inch adapters, and aluminum flight case included

Temperature-Compensated FPL-53 & Schott Triplet Lens Cell

An Ohara FPL-53 Super ED center lens mated with German Schott elements inside a CNC temperature-compensated cell eliminates secondary spectrum chromatic aberration across the visible spectrum. The unobstructed 140mm optical path delivers high contrast on subtle planetary features, supporting practical visual magnifications from 20.0x up to 280x.

Heavy-Duty Losmandy Platform & Multi-Threaded Focuser

Supporting large-format monochrome cameras, filter wheels, and off-axis guiders requires drawtube stability without mechanical sag. The 3.7-inch rack-and-pinion focuser features a 1:10 micro-reduction drive, M92 and M68 threaded interfaces, and a 360-degree field rotator for composition framing. Transported in a rigid flight case, this 11.20 kg optical assembly remains protected during transit.

• 3.7-inch heavy-duty rack-and-pinion focuser with 1:10 micro-tuning control to eliminate drawtube flexure
• Dual M92 and M68 threaded interfaces with 360-degree field rotator for flexure-free imaging
• Heavy-duty CNC mounting rings with a 75mm Losmandy bar for torsional stability on mounts

Photoline 140 Super APO Flagship Warranty & Flight Case

The TS Optics Photoline AP 140/910 ED Triplet OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 140/910 Triplet OTA, retractable dew shield, CNC tube rings, Losmandy dovetail bar, top carrying handle, 2-inch and 1.25-inch adapters, and an aluminum flight case.