TS-Optics 130 mm f/5 Flatfield APO Refractor with Optics Test - Premium Quality

TS 130 mm f/5 Flatfield Apo for Astrophotography

This apochromat offers chromatically very well corrected optics and the best possible field correction. The objective is optimized for very good chromatic correction without compromise. The sphere is also very good. The Ronchi test reveals almost straight lines, even in autocollimation. This means that the apo is designed for observation up to the highest magnification range of around 550x.

For astrophotography, a full-frame corrector was developed especially for this objective. The corrector provides very good imaging quality throughout the field. Even with high-resolution full-frame sensors, such as ZWO´s ASI6200 camera, the stars will remain pinpoint at the edge.

The idea behind the TSAPO130FLAT:
Until now, you have always had to compromise with flatfield optics, sacrificing some sharpness on the axis in favor of good field sharpness. Or you take a "general corrector" and try to achieve the best possible field correction by adapting distances. The result is a compromise, usually a good one, but still a compromise.

The concept behind this apo avoids the compromise, because the 130 mm objective is optimized for highest sharpness on the axis. And the corrector is optimized only for this objective. It is positioned at a fixed distance from the objective in the tube. As soon as you have set the focus, you are automatically at the optimum distance.

The 3.2" focuser:
The focuser is a completely new development with dual speed and reinforced bearing for heavy accessories. Even at maximum load, there is no bending. This is the only way to guarantee pinpoint stars right into the corners. The focuser is compatible with all standard motorized focus systems such as EAF from ZWO or Pegasus FocusCube. In addition, the focuser offers a 360° rotation option and the possibility to tilt the camera.

[*The working distance of the apo

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