TABLE 3
 Optical specifications for the NAC TMA; Far Focus Plate in
              wheel 1, Orange filter in wheel 2

Component Radiu  Separat    Conic    Diamete Centre Tilt of
            s      ion     constant    r or     y    normal
                 along z   or glass   x  y ( coordi wrt. M2
           [mm]   axisa      type      z)a    nate    axis
                   [mm]                [mm]   [mm]   [deg]
Entrance   flat   -690.0               89.4          -6.962
  pupil
 Primary    -     -304.0    CC = -     136    85.2b    0
          1103.            1.65727
           162
Secondary   -     301.5  CC = -1.000   44.0     0      0
          400.5
            98
Tertiary    -     -354.5  CC = 0.000    92   -82.9b    0
          626.5
            83
Filter 1,  flat  -4.942c    fused     40  40 -86.00 -3.8333
surface 1                   silica      (
                         n(645 nm) =  5.000)
                            1.4567
Filter 1,  flat   -5.00c                               -4
surface 2
Filter 2,  flat  -4.687c    OG550     40  40           -4
surface 1                n(645 nm) =    (
                            1.5368    4.746)
Filter 2,  flat  -25.724                            -4.1667
surface 2
  ARP,     flat    -12      fused      51.0  -86.15    0
surface 1                   silica
                         n(645 nm) =
                            1.4567
  ARP,     flat   -8.056                               0
surface 2
   CCD     flat                        27.7  -86.32    0
                                       27.7

          a) z is along the M2 axis, y is in the plane
          containing z and the central object point, x is
          perpendicular to z and y
          b) Geometrical centre of the mirrors. Impact of
          "central" ray is slightly offset (~0.5 mm)
          c) Distance along an axis tilted -4 deg to z-axis,
          perpendicular to filter wheel plane