Optical layout of the ASPIICS coronagraph. The external occulter (not shown) is situated z₀ ≈ 144.3 m to the left. The entrance aperture is situated 120 mm in front of the primary objective with f = 330.35 mm. The field lens and the internal occulter are situated ∼331.15 mm to the right of the PO. The Lyot stop is situated in a conjugate plane to the entrance aperture, before the relay lens O3. The relay lens projects the image from the primary focus onto the detector plane. The filter is situated between the last element of O3 and the detector. The detector is equipped by a protective glass with a 50% neutral density filter. The image and the elements are to scale.