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APM Professional Telescopes

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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ZWO Monochrome Astro Camera ASI461MM Pro cooled, Sensor D=55 mm

ZWO Monochrome Astro Camera ASI461MM Pro cooled, Sensor D=55 mm

100 Million Pixel

ZWO ASI461MM Proprofessional CMOS monochrome medium format camera, cooled

The ZWO ASI461MM Pro is a 100 megapixel camera for astrophotographers who expect top class results. The sensor has a similar dynamic range as a CCD sensor, with unequally higher sensitivity. The camera can be used on all well-corrected telescopes and is a true lightweight for its size at only 910 grams.
The sensor has a 16-bit ADC with 65536 stages, back-illumination technology, and high quantum efficiency, providing great performance for deep-sky imaging, milky way imaging, and research.
Low readout noise, no amplifier glow and no visible fixed-pattern noise further enhance the images.

Medium format with 100 megapixels

The 100-megapixel Sony IMX461 sensor already offers medium format with 44x33 mm image size (approx. 55 mm diagonal) and a high resolution of 11656x8750 pixels. The 3.76-µm pixels have a full-well capacity of 50.3 ke. In 2x2 binning mode, you get an even larger full-well capacity of 198 ke and a larger pixel size of 7.5 µm * 7.5 µm.


Back illumination technology

Sonys backilluminated CMOS image sensor improves sensitivity and noise reduction  the key factors to enhancing image quality, while radically realigning their fundamental pixel structure from front-illumination to back-illumination. It has retained the advantages of CMOS image sensors such as low power consumption and high-speed operation.
The backside exposure improves the light absorption and increases the amount of light at the same time. This allows significantly shorter exposure times and leads to an improved quantum efficiency of up to 91% - maximum of astromomical CMOS cameras.
Sony has newly developed a unique photo-diode structure and on-chip lens optimized for back-illuminated structures, that achieves a higher sensitivity and a lower random noise without light by reducing noise, dark current and defect pixels compared to the conventional front-illuminated structure.

 

ZWO Monochrome Astro Camera ASI461MM Pro cooled, Sensor D=55 mm

ZWO Monochrome Astro Camera ASI461MM Pro cooled, Sensor D=55 mm

ZWO Monochrome Astro Camera ASI461MM Pro cooled, Sensor D=55 mm

ZWO Monochrome Astro Camera ASI461MM Pro cooled, Sensor D=55 mm

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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