TS-Optics REFRACTOR 1.0x Flattener and Field Corrector - 2" connection

TS PHOTOLINE 2" Flattener and Field Corrector for Refractors

With the TSFLAT2, a professional field corrector for apochromats, EDs and normal Fraunhofer achromats is available to the astrophotographer. The corrector is suitable for refractors from f/4 to f/9. In comparison with other 2" correctors, the TSFLAT2 offers some advantages:

♦ Better illumination, even full-frame size sensors can be used.
♦ Generous working distance between 108 mm and 128 mm, depending on the focal length of the telescope.
♦ M48x0.75 - 2" filter thread at the telescope side for filters and at the camera side for further adaptions.
♦ Also visually usable, the sharpnesss in the field is significantly improved.
♦ Easy adaption vie 2" barrel - with the adapter package TSFLAT2A you get a complete adaptation from the flattener to the camera from Teleskop-Service.

The recommended distances from the M48x0.75 thread to the corrector

In principle this rule applies: the shorter the refractor´s focal length, the longer the working distance to the sensor has to be.

♦ focal length < 450 mm: 128 mm
♦ focal length 450-490 mm: 123 mm
♦ focal length 500-550 mm: 118 mm
♦ focal length 560-590 mm: 116 mm
♦ focal length 600-690 mm: 113 mm
♦ focal length 700-800 mm: 111 mm
♦ focal length ab 800 mm: 108 mm

An underrun or an overrun of the distance of up to 5% has no visible effect on the sharpness in the field of sensors with formats up to APS-C. With larger sensors, the tolerance is reduced to 1-2%.

The TSFLAT2 - practical results

The TSFLAT2 in comparison with an 80 mm f/7 ED refractor

♦ Image 1: without Flattener - stars at the edge
♦ Image 2: with a corrector from the manufacturer
♦ Image 3: with the TSFLAT2 - best defined stars at the edge




M27 with the Skywatcher Evostar 80 ED - corrected with the TSFLAT2

The photograph was taken with a Canon EOS DSLR camera. We congratulate Mr. Konrad on the result.




The stars at the edge of the M27 image at full magnification

The peripheral region is shown at full magnification here. The TSFLAT2 offers an optimal image without halos or distorted stars to the edge.

♦ TSFLAT2 flattener
♦ Dust caps