TS Optics Photoline AP 102/714 OTA

Description

Ohara FPL-53 Super ED glass paired with special lanthanum optical glass powers the TS Optics Photoline AP 102/714 OTA apochromatic doublet refractor optical tube assembly. Operating at an f/7.0 focal ratio with a 714mm focal length, this 102mm (4.02 in) clear aperture telescope delivers a 1.14 arcseconds theoretical resolving power and reaches magnitude 12.5, gathering light for high-contrast lunar and planetary observation, double star splitting, and semi-APO deep-sky astrophotography.

The optical system features an air-spaced Lanthanum-ED doublet objective treated with broadband fully multi-coated (FMC) transmission layers and an unobstructed 0% central profile. Built inside an aluminum chassis measuring 600mm retracted and 690mm extended with a 121mm 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 2.5-inch dual-speed rack-and-pinion focuser with an M63x1 thread and an integrated 360-degree field rotator, this 4.10 kg (9.04 lbs) refractor illuminates a 44mm full-frame image circle when paired with dedicated correctors.

Key Features of TS Optics Photoline AP 102/714 OTA

Built for visual observers and astrophotographers seeking high optical contrast without the cool-down time of triplets, this 102mm doublet couples an Ohara FPL-53 element with a 2.5-inch rack-and-pinion focuser. CNC-machined split tube rings, a standard Vixen dovetail bar, and a retractable dew shield ensure mechanical reliability on medium-capacity mounts.

• 102mm (4.02 in) clear aperture with 714mm focal length and versatile f/7.0 optical speed
• Air-spaced ED doublet objective featuring Ohara FPL-53 Super ED and lanthanum optical glass
• Broadband fully multi-coated (FMC) optical layers with an unobstructed 0% central profile
• 2.5-inch dual-speed rack-and-pinion focuser 1:10 with M63x1 thread and 360-degree field rotator
• Generous 150mm back focus distance measured from the 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 retractable dew shield
• Step-down 2-inch to 1.25-inch compression visual adapter included in factory package

Ohara FPL-53 & Lanthanum Doublet Optical Balance

The combination of an Ohara FPL-53 element and high-refraction lanthanum glass cancels secondary chromatic aberration while ensuring rapid thermal equalization in changing nocturnal temperatures. The unobstructed 102mm optical path maximizes contrast along lunar crater rims and planetary features, supporting practical visual magnifications from 14.6x up to 204x.

Precision 2.5-Inch Rack-and-Pinion Drawtube & M63 Coupling

Focusing precision is managed through a 2.5-inch rack-and-pinion focuser with a 1:10 micro-reduction drive, an M63x1 threaded rear interface, and an integrated 360-degree manual rotator for camera framing. Weighing 4.10 kg, this optical tube assembly clamps securely into CNC-machined rings and attaches to tracking mounts via standard Vixen dovetails.

• 2.5-inch dual-speed rack-and-pinion focuser with 1:10 fine-tuning control for critical focal adjustments
• Integrated 360-degree camera field rotator with direct M63x1 threaded interface for imaging trains
• CNC-machined aluminum tube rings with 44mm Vixen dovetail bar for balanced mount attachment

TS Photoline Doublet ED Series Warranty

The TS Optics Photoline 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 Photoline Doublet OTA, retractable dew shield, CNC tube rings, Vixen dovetail bar, and a 2-inch to 1.25-inch compression adapter.