The first attempt does not work out well, since it's difficult to print the 77mm thread.
I have tuned the printing parameters for several times but it didn't help much.
Therefore, I design another adapter from ground zero again. I found the original 77mm ring for the FD mounting mechanism could be reused and here's the prototype:
Some fitting issues, and I did the fitting with a cutter.
It looks great, with the NGF-CM fitted.
The whole model was refined and printed again. I will use black PETG in the final version and add felt lined black sticked inside.
Three generation of equipments combined: Canon FD lens, JMI focuser and ZWO EAF.
I am so excited, and I hope I can try it out soon.
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