Three-channel general-purpose astrophotometer
| Number of channels (CH1, CH2 and CH3) | 3 |
| Distance between the channels CH1 and CH2 | 26 mm to 50 mm (7 arcmin to 13 arcmin for F=13 m) |
| CH1 and CH3 | 20 mm (5,3 arcmin for F=13 m) |
| Possible deviation of CH3 | +/- 2 mm (31 arcs for F=13 m) |
| Number of filter wheels | 2 (for CH2 and for CH1+CH2) |
| Number of filters in each filter wheel | 10 in CH1 (5 pairs in CH1+CH3) |
| Diameter of filters | 13 mm |
| Number of aperture wheels | 2 (for CH2 and for CH1+CH3) |
| Number of apertures in each wheel | 10 in CH1 (5 pairs for CH1+CH3) |
| Diameter | 0,3 to 8,0 mm (5 arcs to 2 arcmin for F=13m) |
| Diameter of field eyepiece | 40 mm (10,2 arcmin for F=13 m) |
| Number of aperture microscopes | 2 (for CH2 and for CH1+CH3) |
| Magnification of aperture microscopes | 25X |
| Diameter of the field of microscopes | 8 mm (2 arcmin) |
| Number of Fabri lenses | 3 |
| Diameter of Fabri lenses | 14 mm |
| Focus length of Fabri lenses | 30 mm |
| Diameter of outcoming pupil | 2,5 mm |
| Spectral range |
300 to 650 nm (PMT - R647P) 185 to 850 nm (PMT - R1463P) |
| Temeperature of the PMTs | two stabilized temperatures -5°C and -15°C which can be set depending on the enviromental temperature |
| System of the PMT cooling | one stage thermoelectric cooler with actively ventilated heat absorber |
| Dimensions of the photometer |
height 410 +/- 5 mm max diameter (including microscopes) 210 +/- 5 mm max diameter of the main frame 140 +/- 5 mm |