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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.

Astronomy is our job

Observatory Telescopes

Big prime focus telescopes for private or public observatories including installation and full service.

Robotic / Remote

Robotic instruments for automatic imaging or telescopes for remote observation.

UVEX Spectrograph

Uvex Spectrograph

The UVEX is a “crossed” Czerny-Turner spectroscope optimized for wavelengths from near UV (<350nm) to near IR (1µm).

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Diffraction Limited CCD Kameras

Aluma CCD 695 a

Our most popular camera, the SBIG Aluma AC4040 is a large format Scientific CMOS camera, featuring a 16.8 megapixel sensor with 9 micron pixels. The camera is compatible with the StarChaser SC-4 Guider and optional AO-X Adaptive Optics accessories.

Diffraction Limited Overview

Astroshell Dome 4.25 m

CLAMSHELL DOMES provide an unparalleled 360/180 degree field of view for an absolutely breathtaking nighttime experience. When this observatory dome opens, you are truly among the stars!

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Telescopes

Atmospheric dispersion corrector

Lenght	35mm
surface accuracy	Better L/10 at 633 nm
Unobstructed diameter	17mm
Connectingthread	on both sides T2 (M42x0,75)
Coating	AR-couting: 340-900nm

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:

Lenses are made of quartz
No image shift
No axis coma or astigmatism
100% made in Germany

Downloads

Manual_adk_de.pdf (German)

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.