TS Optics AP 106/700 FDC100 OTA

Description

Hoya FDC100 synthetic fluorite paired with lanthanum mating glasses powers the TS Optics AP 106/700 FDC100 OTA apochromatic triplet refractor telescope optical tube assembly. Operating at an f/6.6 focal ratio with a 700mm focal length, this 106mm (4.17 in) clear aperture instrument delivers a 1.09 arcseconds theoretical resolving power and reaches magnitude 12.8, gathering light efficiently for high-resolution deep-sky astrophotography, broad-band galaxy auditing, and color-free lunar and planetary visual observation.

The optical system features an air-spaced Super APO triplet configuration seated inside a temperature-compensated lens cell, treated with broadband fully multi-coated (FMC) anti-reflection layers and maintaining an unobstructed 0% central obstruction profile. Housed in an aluminum chassis measuring 590mm retracted and 690mm extended with a 140mm outer dew shield diameter, the optical tube provides 170mm of back focus from the 2-inch visual back (55mm standard when using dedicated M48 flattener threads). Equipped with an oversized 3.5-inch dual-speed rack-and-pinion focuser, an M68x1 rear thread, and a 360-degree field rotator, this 6.70 kg (14.77 lbs) refractor illuminates a 44mm full-frame image circle when paired with dedicated correctors.

Key Features of TS Optics AP 106/700 FDC100 OTA

Engineered for high-resolution astro-imaging and planetary observation, this 106mm triplet pairs synthetic fluorite glass with an oversized 3.5-inch rack-and-pinion focuser to eliminate imaging train flexure. CNC-machined split tube rings, a standard Vixen dovetail bar, and a fitted aluminum transport case provide dependable field performance on medium-capacity tracking mounts.

• 106mm (4.17 in) clear aperture with 700mm focal length and f/6.6 optical speed
• Air-spaced Super APO triplet objective with Hoya FDC100 and lanthanum mating elements
• Broadband fully multi-coated (FMC) optical layers with an unobstructed 0% central profile
• 3.5-inch heavy-duty dual-speed rack-and-pinion focuser 1:10 with M68x1 thread and field rotator
• Generous 170mm back focus distance measured from the 2-inch visual back
• 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 and 1.25-inch compression adapters and aluminum transport case included

Hoya FDC100 Fluorite & Lanthanum Triplet System

The air-spaced triplet lens cell pairs a center Hoya FDC100 synthetic fluorite element with high-index lanthanum glass to eliminate secondary spectrum chromatic fringing across broad optical bandwidths. The temperature-compensated cell preserves optical alignment during rapid nocturnal temperature drops, supporting high-contrast visual and video magnifications from 15.1x up to 212x.

Oversized 3.5-Inch Drawtube & M68 Photographic Thread

Heavy full-frame cameras, filter wheels, and off-axis guiders require rigid mechanical drawtube support. The 3.5-inch rack-and-pinion focuser delivers flexure-free travel via a 1:10 micro-reduction gear, an integrated M68x1 female thread for direct camera coupling, and a 360-degree manual field rotator. Transported in a rigid aluminum transport case, this 6.70 kg optical assembly remains protected against mechanical stress.

• 3.5-inch dual-speed rack-and-pinion focuser with 1:10 micro-tuning control to eliminate camera sag
• Integrated 360-degree manual field rotator with direct M68x1 threaded coupling for imaging trains
• Durable aluminum transport case providing rigid protection during astronomical field travel

TS Photoline Triplet Series Warranty & Case

The TS Optics AP 106/700 FDC100 OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 106/700 Triplet OTA, retractable dew shield, CNC tube rings, Vixen-style dovetail bar, 2-inch and 1.25-inch compression adapters, and an aluminum transport case.