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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.

SBIG STC-7

Filters

Bessell / Classic UBVRI Filters

Bessell UBVRI filterset

Bessell UBVRI filter set for imaging based on the Johnson-Cousins photometric survey. Photometric filters are used to determine the brightness of stars in various, precisely defined spectral ranges of light.

filter bild

U-Bessell: UV photometric filter in UBVRI series
B-Bessell: Blue photometric filter in UBVRI series
V-Bessell: Green (Visible) photometric filter in UBVRI series
R-Bessell: Red photometric filter in UBVRI series
I-Bessell: NIR photometric filter in UBVRI series

ubvri filtergrössen

chroma ubvri filter

chroma ubvri OD

All transmission and blocking (OD) data are actual, measured spectra of representative production lots. Spectra varies slightly from lot to lot. Optical density values in excess of 6 may appear noisy because such evaluations push the resolution limit of low light level measurements.

Classic UBVRI Filterset

Classic Bessell UBVRI filter set for imaging based on the Johnson-Cousins photometric survey

classic ubvri

classic ubvri OD

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.