Table 1.
Optical parameters of the seven foci. Nasmyth Opt1 and Nasmyth IR1 are equipped with respective dedicated image rotator units. Nasmyth Opt2 and Nasmyth IR2 are not equipped with image rotators and do not constitute Ritchey-Chrétien optics
| (1) | (2) | (3) | (4) |
|---|---|---|---|
| Focus | b1 | b2 | Top unit |
| Prime | −1.0082456 | NA | Corrector Lens |
| Cassegrain Opt | −1.0082456 | −1.91608 | CasOptM2 |
| Cassegrain IR | −1.0084109 | −1.91787 | CasIRM2 |
| Nasmyth Opt1 | −1.0083945 | −1.86543 | NasOptM2 |
| Nasmyth IR1 | −1.019724 | −1.91787 | CasIRM2 |
| Nasmyth Opt2 | −1.0061814 | −1.86543 | NasOptM2 |
| Nasmyth IR2 | −1.017608 | −1.91787 | CasIRM2 |