Thought I'll post these here
https://takahashijapan.jp/2024/09/04/newfct-fc-fs/
FCT-65D Fluorite Triplet Apochromat. D=65mm, F=400mm, f/6.2
FC-76DP Fluorite Doublet Apochromat. D=76mm, F=570mm, f/7.5
FS-60CP Fluorite Doublet Apochromat. D=60, F=355mm, f/5.9