TS Optics CF-APO 130 FPL55 Triplet AP 130/910 OTA

Description

Resolve fine Jovian cloud structure and capture faint emission nebulae using the TS Optics CF-APO 130 FPL55 Triplet AP 130/910 OTA reference-class apochromatic refractor optical tube assembly. Featuring an unobstructed 130mm (5.12 in) clear aperture and an f/7.0 focal ratio with a 910mm focal length, this instrument achieves a 0.89 arcseconds theoretical resolving power and reaches magnitude 13.3, collecting photons for observatory-grade deep-sky astrophotography, planetary video imaging, and high-power visual astronomy.

The optical system features an air-spaced Super APO triplet configuration housed 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 measuring 800mm retracted and 950mm extended with a 168mm outer dew shield diameter, the tube assembly supplies 180mm of back focus from the rear mechanical thread (55mm standard from dedicated M48 flattener threads). Equipped with an oversized 3.7-inch dual-speed rack-and-pinion focuser with M92 and M68 threads and a 360-degree rotator, this 10.30 kg (22.71 lbs) refractor illuminates a 44mm full-frame image circle.

Key Features of TS Optics CF-APO 130 FPL55 Triplet AP 130/910 OTA

Built for demanding digital astrophotographers and planetary visual observers, this 130mm triplet couples an Ohara FPL-55 element with an interferometer-certified Strehl ratio of 0.95 or higher. Its massive 3.7-inch rack-and-pinion focuser, heavy CNC tube rings, and aluminum flight case provide exceptional mechanical stability on equatorial mounts.

• 130mm (5.12 in) clear aperture with 910mm 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
• 3.7-inch heavy-duty dual-speed rack-and-pinion focuser 1:10 with M92/M68 threads and rotator
• Generous 180mm rear back focus distance (55mm from dedicated M48 flattener thread)
• Corrected 44mm full-frame image circle when paired with dedicated flattener or reducer
• Heavy CNC tube rings with 75mm Losmandy-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 Performance

The combination of an Ohara FPL-55 center lens and high-dispersion lanthanum mating elements in a compensated cell eliminates secondary spectrum chromatic fringing across broad bandwidths. With a factory-certified Strehl ratio of 0.95 or higher, the unobstructed 130mm optical train delivers high contrast on low-contrast features across practical magnifications from 18.6x up to 260x.

Massive 3.7-Inch Dual-Speed Drawtube & M92/M68 Couplings

Supporting heavy camera trains, filter wheels, and large correctors requires drawtube rigidity without mechanical sag. The 3.7-inch rack-and-pinion focuser features a 1:10 micro-reduction drive, M92 and M68 rear connection threads, and an integrated 360-degree field rotator for sensor orientation. Protected inside an aluminum flight case, this 10.30 kg optical tube assembly remains secure during transport.

• 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

TS CF-APO Series Guarantee & Certification

The TS Optics CF-APO 130 FPL55 Triplet AP 130/910 OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 130/910 CF-APO OTA, individual Zygo test certificate, heavy CNC tube rings, Losmandy dovetail bar, top handle, and an aluminum flight case.