Astronomy Specialist

TAKAHASHI TOA-150B ORTHO-APO TRIPLET

$25,699.00 AUD
SKU: TK-TOK15110

Takahashi

Ortho-Apochromatic triplet

150 mm

f/7.3

1100 mm

15.2 kg


Style

 

In stock now!

 

The Takahashi TOA-150B is an Ortho-Apochromatic triplet refractor with the highest possible correction of any refractor on the market. The unique optical configuration based on a highly air-spaced triplet completely eliminates spherical aberration while having the best chromatic correction in the Takahashi range. With two S-FPL53 ED elements, the air-spaced triplet lens cell has a Strehl ratio of 99.8% at the optimal wavelengths of human vision.

The TOA-150B is equipped with an oversized 4" rack and pinion focuser with a precise 1:7 microfocuser, CAA camera angle adjuster for photographic framing, FQR-1 base for 7 x 50 finderscope (finder not included) and a retractable dew shield.

The TOA-150B has a native focal length of 1100mm and a focal ratio of f/7.3, making it the ideal instrument for capturing a wide range of deep sky objects such as planetary nebulae and galaxies. Due to its extraordinary correction, the TOA-150 also excels at high resolution planetary imaging.

Typical apochromatic refractors are corrected for chromatic aberration at the expense of increasing spherical aberration at certain wavelengths. The TOA's unique design eliminates this problem, with less than 0.01mm focal shift across the visible spectrum - 1/100th less aberration than typical apochromatic designs!

A selection of different field correctors are available to suit different applications (sold separately). With the optional TOA-35RD focal reducer, the telescope is transformed into a full-frame capable astrograph with a large 44mm image circle. For even larger sensors, the TOA-645 field flattener provides a corrected image circle of 90mm, making it suitable for use with the largest sensors available.

In addition, a 1.5x focal extender is available, also corrected for full-frame sensors with a 44mm image circle.

For serious imaging, the Prima Luce Lab Esatto 4" robotic microfocuser is compatible with an additional adapter. NOTE: Use of the optional focal reducers will likely require a custom adapter for the Esatto. Please contact us for more information.

Note: The OTA ONLY variant does not include tube rings or a dovetail bar. For the TOA-150B, you can use the PrimaLuceLab 180mm PLUS tube rings in combination with the PrimaLuceLab 350mm Losmandy bar.

 

 

Spot diagram of Takahashi TOA-150B at prime focus.

 

 

Spot diagram of Takahashi TOA-150B with TOA-35 FL field flattener.

 

 

Spot diagram of Takahashi TOA-150B with TOA-645 field flattener.

 

 

Spot diagram of Takahashi TOA-150B with TOA-35 RD 0.7x focal reducer.

 


 

Optical design Ortho-apochromatic triplet with ED glass
Lens cell
Highly air-spaced triplet with 3 lenses in 3 groups, 2 x S-FPL53 lenses
Coatings
Hard multicoatings
Objective diameter
150 mm
Focal length at prime focus
1100 mm
Focal ratio at prime focus
F/7.3
Backfocus distance at prime focus
275 mm
Dew shield diameter 206 mm
Tube diameter 179 mm
Tube length 1270 mm with dew shield extended, 1110 mm with dew shield retracted
Tube weight 15.2 kg
SKU TOK15110

 

Prime focus focal length 1100 mm
Prime focus focal ratio
F/7.3
Prime focus backfocus distance
275 mm
TOA-35FL flattener focal length
1080 mm
TOA-35FL flattener focal ratio
F/7.2
TOA-35FL flattener backfocus distance
117.5 mm
TOA-35FL flattener image circle
40 mm
TOA-645 flattener focal length 1085 mm
TOA-645 flattener focal ratio F/7.2
TOA-645 flattener backfocus distance 73.9 mm (from M72 x 1 thread), 56.2 mm (from CA35 ring with M54 x 0.75)
TOA-645 flattener image circle 90 mm
TOA-35RD 0.7x reducer focal length
775 mm
TOA-35RD 0.7x reducer focal ratio
F/5.2
TOA-35RD 0.7x reducer backfocus distance
62.5 mm
TOA-35RD 0.7x reducer image circle
44 mm
EXT-ED 1.5x extender focal length 1650 mm
EXT-ED 1.5x extender focal ratio F/11
EXT-ED 1.5x extender backfocus distance 117.5 mm
EXT-ED 1.5x extender image circle 44 mm

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TAKAHASHI TOA-150B ORTHO-APO TRIPLET.

TAKAHASHI TOA-150B ORTHO-APO TRIPLET

From $25,699.00 AUD

Style

  • OTA Only
  • Complete Assembly

Optical design

Ortho-Apochromatic triplet

Image circle

Focal ratio

f/7.3

Aperture

150 mm

Focal length

1100 mm

Optical thickness

Threads

Cooled

Colour or Mono

Pixel size

Sensor dimensions

Resolution

Sensor diagonal

Quantum efficiency

Read noise

Fullwell capacity

Bit depth

FPS

Camera backfocus

Filter size

Filter size

Bandpass (FWHM)

Bandpass (FWHM)

Glass thickness

Mount type

Payload capacity

Latitude range

Dovetail saddle

Slew speed

Encoders

Periodic error correction

Counterweight shaft

Azimuth adjustment range

Internal diameter

Illuminated diameter

Compatible telescope external diameter

Weight

15.2 kg

Length

Width

Height

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