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The dispersion corrector is a component that corrects the refraction of light in the atmosphere. Simply explained, you often see colour fringes on bright low objects when observing with the telescope. Large or bright objects such as Jupiter, Venus and Sirius have a red and blue colour fringe and also appear distorted near the horizon. This effect is caused by the refraction of light in the atmosphere and is called atmospheric dispersion. The atmosphere acts like a prism here and fans out the incoming light beam into its spectral components. This effect is stronger the lower the object is above the horizon. Using the ADK is very simple. With the multi-function dial, both the direction of the dispersion (zenith) and the strength of the correction can be set. In the zero position of the dispersion, a small mechanical detent can be felt. This makes it very easy to find the neutral position. The maximum correction is reached after one turn. After a further turn, there is again no correction in the neutral position. If you continue to turn, the maximum correction in the opposite direction is reached after one turn and the initial position after another turn. The adjusting wheel must always point in the direction of dispersion.
The special feature of this model:
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APM Professional Telescopes
1m F/8 Ritchey Chrétien with dual Nasmyth Foci, Cape Town (South Africa)
Another large telescope for the South African Astronomical Observatory (SAAO). An 1m F/8 Alt-Az mounted Ritchey Chrétien for robotic use. It has dual Nasmyth Foci. The main telescopes used for research are located at the SAAO observing station (32°22.795’S 20°48,657’E) near Sutherland in the Northern Cape, a 4-hour drive from Cape Town.
ASA Telescopes
ASA600 OTA is the perfect fit for the ASA direct drive mounts with absolute encoders. As all ASA telescopes the ASA600 is equipped with quartz glass optics from ASA.
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FLI Filterwheels
The CenterLine's unique dual carousel design with central aperture has long been the filter wheel of choice to avoid telescope balance issues. Typically one position in each carousel is empty, providing 8 usable positions.
Chroma Filter
Optical Filters for Astronomy Applications - made in USA
- Bandpass Filters (H-Alpha, OIII, SII, H-Beta, Jovian Methane, LoGlow Light Pollution Filter)
- LRGB Filters (and combined with H-Alpha)
- Bessel / Classic UBVRI Filters
- Sloan ugriz Filters
- Ha, OIII and SII Filter with 5nm or 3nm F/3
APM Professional Telescopes
1m F/8 Ritchey Chrétien with dual Nasmyth Foci, Cape Town (South Africa)
Another large telescope for the South African Astronomical Observatory (SAAO). An 1m F/8 Alt-Az mounted Ritchey Chrétien for robotic use. It has dual Nasmyth Foci. The main telescopes used for research are located at the SAAO observing station (32°22.795’S 20°48,657’E) near Sutherland in the Northern Cape, a 4-hour drive from Cape Town.
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