I'm going to throw this out there for grins - I doubt I'd do anything like this, but it's a fun thought experiment for the next several hours...
I can guarantee that I will NOT be the first person to take a Dremel tool to a >$10K lens but someone might get creative.
- F Mount 300 VRII had a plain glass filter in the holder, various people removed it and claimed it was better or equal IQ.
- Z Mount lenses have special notches cut in the mount to allow TC's
I can guarantee that I will NOT be the first person to take a Dremel tool to a >$10K lens but someone might get creative.