TS Optics AP 150/1200 SD f/8 FPL53 OTA

Description

Resolve subtle Jovian atmospheric storms and split challenging binary stars using the TS Optics AP 150/1200 SD f/8 FPL53 OTA large-aperture super low dispersion doublet refractor optical tube assembly. Featuring a long 1200mm focal length and an f/8.0 optical speed, this 150mm (5.91 in) clear aperture instrument delivers a 0.77 arcseconds theoretical resolving power and reaches magnitude 13.6, collecting photons for observatory-grade planetary video astronomy and high-resolution visual observing.

The optical system utilizes an air-spaced Super Low Dispersion doublet objective combining Ohara FPL-53 Super ED glass with a matched lanthanum mating element, treated with broadband fully multi-coated (FMC) layers with an unobstructed 0% central profile. Built inside an aluminum chassis measuring 1080mm retracted and 1260mm extended with a 185mm outer dew shield diameter, the tube assembly supplies 190mm of mechanical back focus from the rear mechanical thread. Supported by a massive 3.7-inch dual-speed rack-and-pinion focuser with M82x1 and M68x1 threads and a 360-degree rotator, this 12.20 kg (26.90 lbs) refractor illuminates a 44mm full-frame image circle when paired with dedicated correctors.

Key Features of TS Optics AP 150/1200 SD f/8 FPL53 OTA

Designed for permanent observatories and heavy-duty field tripods, this 150mm SD refractor couples a large 6-inch aperture with an Ohara FPL-53 doublet lens. Its massive 3.7-inch rack-and-pinion focuser, heavy CNC tube rings, and standard Losmandy dovetail plate provide exceptional mechanical stiffness under heavy accessory loads.

• 150mm (5.91 in) clear aperture with 1200mm focal length and f/8.0 optical speed
• Air-spaced SD doublet objective featuring Ohara FPL-53 Super ED and lanthanum glass
• Broadband fully multi-coated (FMC) anti-reflection layers with 0% central obstruction
• 3.7-inch heavy-duty dual-speed rack-and-pinion focuser 1:10 with M82x1 and M68x1 threads
• Generous 190mm mechanical back focus distance measured from rear mechanical 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 carrying handle
• Retractable dew shield, 2-inch adapter, and 1.25-inch visual back adapter included

Large-Aperture FPL-53 Super ED & Lanthanum Optics

By pairing Ohara FPL-53 Super ED glass with an optical lanthanum element in an f/8.0 geometry, this refractor eliminates secondary spectrum chromatic aberration while offering rapid cool-down times compared to large triplets. The unobstructed 150mm optical train maximizes contrast on subtle lunar rilles and planetary discs across practical magnifications from 21.4x up to 300x.

Massive 3.7-Inch Dual-Speed Drawtube & M82 Mechanical Coupling

Holding heavy camera trains, filter wheels, and large visual diagonals requires high mechanical rigidity. The 3.7-inch rack-and-pinion focuser incorporates a 1:10 micro-reduction drive, M82x1 and M68x1 female connection threads, and a 360-degree field rotator to prevent flexure. Mounted on solid Losmandy-style dovetail plates, this 12.20 kg telescope provides stable tracking on heavy equatorial mounts.

• 3.7-inch heavy-duty rack-and-pinion focuser with 1:10 micro-reduction for smooth focusing control
• Dual M82x1 and M68x1 threaded interfaces with 360-degree rotator for flexure-free camera coupling
• Heavy-duty CNC mounting rings with a 75mm Losmandy dovetail bar for maximum torsional stability

TS Photoline SD APO Series Warranty & Hardware

The TS Optics AP 150/1200 SD f/8 FPL53 OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 150/1200 SD OTA, retractable dew shield, CNC tube rings, Losmandy-style dovetail bar, top carrying handle, and 2-inch and 1.25-inch visual adapters.