Lens
Magic circle 5 st
SC 5 x3
Boards
Magic circle 4 st
3SC in each st
SC (3SC SC 2) x3 3SC SC
SC 2 (3SC SC 4) x3 3SC SC 2
SC 3 (3SC SC 6) x3 3SC SC 3 (stop here for front board)
SC 4 (3SC SC 8) x3 3SC SC 4
SC 5 (3SC SC 10) x3 3SC SC 5
SC and SL at your discretion to smooth out the edge
Bellows
Working into the front board, one round in from the edge, HDC 28
SL to join round, turn, BLO HDC 28 (your choice if using chain or standing HDC)
SL to join round, turn, BLO (HDC 3 2HDC HDC 3) x4
SL to join round, turn, BLO HDC 32
SL to join round, turn, BLO (HDC 4 2HDC HDC 3) x4
SL to join round, turn, BLO HDC 36
SL to join round, turn, BLO (HDC 4 2HDC HDC 4) x4
SL to join round, turn, BLO HDC 40
SL to join round, turn, BLO (HDC 5 2HDC HDC 4) x4
Stitch onto back board, similarly one round in from the edge
Cape
Chain 12
HDC 11
HDC 5 2HDC 1 HDC 5
(HDCinc 1 HDC across 2HDC 1) repeat until desired length