TAKAHASHI TOA-150B ORTHO-APO TRIPLET

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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.