TAKAHASHI TOA-130NS ORTHO-APO TRIPLET
Takahashi
Ortho-Apochromatic triplet
10.5 kg
TAKAHASHI TOA-130NS ORTHO-APO TRIPLET - OTA Only is backordered and will ship as soon as it is back in stock.
The Takahashi TOA-130NS 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-130 has a native focal length of 1000mm and a focal ratio of f/7.7, 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-130 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 three 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 60mm, making it suitable for use with medium-format sensors.
In addition, a 1.5x focal extender is available, also corrected for full-frame sensors with a 44mm image circle.
The 2.7" rack and pinion focuser is smooth and accurate. For serious imaging, the Prima Luce Lab Esatto 3" robotic microfocuser is compatible with the additional PL3600245 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-130NFB, you can use the PrimaLuceLab 155mm PLUS tube rings in combination with the PrimaLuceLab 350mm Losmandy bar.
Specifications
| 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 |
130 mm |
| Focal length at prime focus |
1000 mm |
| Focal ratio at prime focus |
F/7.7 |
| Backfocus distance at prime focus |
225.5 mm |
| Dew shield diameter | 180 mm |
| Tube diameter | 156 mm |
| Tube length | 1145 mm with dew shield extended, 1012 mm with dew shield retracted |
| Tube weight | 10.5 kg |
| SKU | TOK13010 |
Measurements
| Prime focus focal length | 1000 mm |
|---|---|
| Prime focus focal ratio |
F/7.7 |
| Prime focus backfocus distance |
222.5 mm |
| TOA-35FL flattener focal length |
980 mm |
| TOA-35FL flattener focal ratio |
F/7.5 |
| TOA-35FL flattener backfocus distance |
117.5 mm |
| TOA-35FL flattener image circle |
40 mm |
| TOA-645 flattener focal length | 990 mm |
| TOA-645 flattener focal ratio | F/7.6 |
| TOA-645 flattener backfocus distance | 83.7 mm (from M72 x 1 thread), 56.2 mm (from CA35 ring with M54 x 0.75) |
| TOA-645 flattener image circle | 60 mm |
| TOA-35RD 0.7x reducer focal length |
698 mm |
| TOA-35RD 0.7x reducer focal ratio |
F/5.4 |
| 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 | 1500 mm |
| EXT-ED 1.5x extender focal ratio | F/11.5 |
| EXT-ED 1.5x extender backfocus distance | 117.5 mm |
| EXT-ED 1.5x extender image circle | 44 mm |
Downloads
 TOA-130 instruction manual
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