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Wide-Field Imager at the Wendelstein 2-m Telescope (WWFI)
| Field of view | 26.6 × 29.0 arc min (gaps: 22″, 98″) |
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| Number of pixels | 4 × 4096 × 4096 |
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| Pixel scale | 0.199 arc sec/pixel integrated in a SI 900 camera system by Spectral Instruments, Tucson |
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| Read-out time | 8.5 sec at 500 kHz, 40 sec at 100 kHz |
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| Read-out noise | 7.8 e− at 500 kHz, 2.2 e− at 100 kHz |
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| Gain | 5.8 e−/ADU at 500 kHz, 0.7 e−/ADU at 100 kHz |
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| Dynamic range | 16 bit |
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| Full well capacity | > 250 ke−/pix |
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| Peak QE | 0.9 |
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| Filter positions | 12+2 in 2 wheels |
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| Filters | Sloan u′, g′, r′, i′, z′ |
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| Zero points (SDSS filters) | u′: 24.4, g′: 25.4, r′: 25.3, i′: 24.7, z′: 23.8 |
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| Auto guiding | 2 off-axis 2k × 2k CCDs |
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