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The WO would be the better for astrophotography. The Tak fluorite doublets are not really APO. They tend to have blue halos on bright stars so blue is not in focus. I have had both FS102 and FS152. Beautifully visually but not 100% for imaging.
The WO is a triplet which is usually what you need for APO and for imaging.
Personally I found viewing through the FS102 to dim and limited to widefield views only. Which is fine but its quite limited. The FS152 though despite not being a true APO gave me some of the very best visual views of any telescope.
Greg.
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