TS Optics CF-APO 102 FPL55 Triplet AP 102/714 OTA

Description

Operating at a 714mm focal length with 1.14 arcseconds theoretical resolving power, the TS Optics CF-APO 102 FPL55 Triplet AP 102/714 OTA is a color-free reference-grade apochromatic refractor telescope optical tube assembly. Sized with an unobstructed 102mm (4.02 in) clear aperture and an f/7.0 focal ratio, this instrument gathers light to visual magnitude 12.5, delivering high optical contrast on lunar formations, splitting tight double stars, and capturing high-precision deep-sky astrophotography targets.

The optical system features an air-spaced Super APO triplet objective mounted in a temperature-compensated lens cell, treated with ultra-wideband anti-reflection multi-coatings with an unobstructed 0% central profile. Built inside an aluminum chassis extending from 600mm retracted to 690mm extended with a 134mm outer dew shield diameter, the tube assembly supplies 150mm of back focus from the rear mechanical thread (55mm standard from dedicated M48 flattener threads). Supported by a 3.3-inch heavy-duty dual-speed rack-and-pinion focuser with an M68x1 rear thread and an integrated 360-degree rotator, this 5.60 kg (12.35 lbs) refractor illuminates a 44mm full-frame image circle.

Key Features of TS Optics CF-APO 102 FPL55 Triplet AP 102/714 OTA

Engineered for astro-imaging and visual planetary auditing, this 102mm triplet pairs an Ohara FPL-55 element with an interferometer-certified Strehl ratio of 0.95 or higher. A 3.3-inch rack-and-pinion focuser prevents drawtube flexure, while CNC tube rings, a top handle, and an aluminum flight case provide dependable field utility.

• 102mm (4.02 in) clear aperture with 714mm focal length and f/7.0 optical speed
• Air-spaced Super APO triplet objective with Ohara FPL-55 and lanthanum mating elements
• Ultra-wideband multi-coatings with interferometer certified Strehl ratio of 0.95 or greater
• 3.3-inch heavy-duty dual-speed rack-and-pinion focuser 1:10 with M68x1 thread and field rotator
• Generous 150mm rear back focus distance (55mm from dedicated M48 flattener 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 utility handle
• Individual Zygo test certificate, retractable dew shield, and aluminum flight case included

Ohara FPL-55 & Lanthanum CF-APO Triplet Optics

An Ohara FPL-55 Super ED center element paired with high-refraction lanthanum glass eliminates secondary spectrum chromatic aberration across the optical path. Certified by an individual factory interferometric test report verifying a Strehl ratio of 0.95 or higher, the unobstructed optics support practical visual magnifications from 14.6x up to 204x.

Rigid 3.3-Inch Drawtube & M68 Thread Coupling

Mechanical rigidity under heavy imaging loads is maintained by a 3.3-inch rack-and-pinion focuser featuring a 1:10 micro-reduction drive, an M68x1 rear thread, and an integrated 360-degree field rotator for sensor orientation. Packed in an aluminum flight case, this 5.60 kg optical assembly is well protected during field travel.

• 3.3-inch dual-speed rack-and-pinion focuser with 1:10 micro-reduction control for tactile precision
• Direct M68x1 threaded connection with integrated 360-degree rotator for flexure-free imaging
• Custom aluminum hard flight case providing impact protection during remote astronomical transport

TS CF-APO Series Warranty & Test Certificate

The TS Optics CF-APO 102 FPL55 Triplet AP 102/714 OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 102/714 CF-APO OTA, individual Zygo test certificate, CNC tube rings, Vixen dovetail, top handle, and an aluminum flight case.