Takahashi TOA-150B Refractor OTA

• The flagship, and it shows. The TOA-150B is Takahashi's top-of-the-line refractor, built resolutely for imaging and engineered to carry the heaviest photo setups, including large-sensor CCD cameras, without a hint of mechanical strain.
• Ortho-Apochromat, not just apochromat. The Triplet Ortho-Apochromat design, built around a highly air-spaced ED triplet with two S-FPL53 elements, completely eliminates spherical aberration while delivering the best chromatic correction in the entire Takahashi lineup.
• Sharp planets, deep skies, same telescope. That optical formula lets the TOA-150B excel at high-resolution planetary work and deep sky imaging alike, fully exploiting the largest sensors on the market.
• A focuser built for serious payloads. An oversized 4" (102 mm) rack-and-pinion focuser with a 1/7 microfocuser delivers the fine control heavy imaging trains demand, backed by a CAA (Camera Angle Adjuster) ring for effortless photographic framing.
• Ready to find what you're aiming at. The built-in FQR-1 base accepts a 7x50 finder scope, so locating targets stays simple even with a 150 mm aperture up top.
• Go wide, go deep, or go long. Pair it with the TOA-35RD 0.7x field flattener for faster deep sky work, or step up to the 67FL super-corrector for a massive 92 mm image circle, giving this one tube serious range.
• Packs smart despite the size. A retractable dew shield shrinks the tube from 1270 mm down to 1110 mm for storage, keeping a 150 mm apo as manageable as a scope this size can be.

Specifications

• Optical Design: ED Triplet Ortho Apochromat
• Lens Cell: Highly air-spaced triplet, 3 lenses in 3 groups, with 2x S-FPL53 ED lenses
• Coatings: Hard multicoatings
• Diameter: 150 mm

At Prime Focus

• Focal Length: 1100 mm
• Focal Ratio: F/7.3
• Metal Back Distance: 275 mm

With TOA-35FL Field Corrector

• Focal Length: 1080 mm
• Focal Ratio: F/7.2
• Image Circle Diameter: 40 mm
• Metal Back Distance: 117.5 mm

With 67FL Field Corrector

• Focal Length: 1090 mm
• Focal Ratio: F/7.3
• Image Circle Diameter: 90 mm
• Metal Back Distance: 106.2 mm

With TOA-35RD Focal Reducer

• Focal Length: 775 mm
• Focal Ratio: F/5.2
• Image Circle Diameter: 44 mm
• Metal Back Distance: 62.5 mm

With EX ED1.5X Focal Extender

• Focal Length: 1650 mm
• Focal Ratio: F/11
• Image Circle Diameter: 44 mm
• Metal Back Distance: 117.5 mm

Optical Tube

• Length: 1270 mm (1110 mm with dew shield retracted)
• Tube Diameter: 179 mm
• Dew Shield Diameter: 206 mm
• Weight: 15.2 kg
• Focuser: 4" (102 mm) Rack-and-pinion with 1/7 microfocuser

What's in the Box?

• TOA-150B Optical Tube Assembly x1
• FQR-1 Finder Scope Base x1

Note: The TOA-35FL field corrector, 67FL super-corrector, TOA-35RD focal reducer, and EX ED1.5X focal extender are optional accessories, sold separately.

Software and Docs?

System-chart of Takahashi TOA-150B refractor

System-chart of Takahashi TOA-150B refractor with 67FL field corrector

System-chart of Takahashi TOA-150B refractor with TOA-35RD focal reducer

System-chart of Takahashi TOA-150B refractor with EX ED1.5X focal extender

Instruction manual of Takahashi TOA-150B refractor