I'll keep it short since I don't have a lot of time right now.
Recently acquired a Tokina 1.6x Expander, thinking it might be nice to have as an option to extend / expand certain zooms or primes for larger gate coverage on Monstro and other cameras with larger sensors.
I'm very pleased with it so far.
Works great with my Angenieux EZ-1 30-90 (instead of buying a swappable group - I just use this).
I was even more pleasantly surprised when I tried it with the Sony Cinealta Mark2 Primes.
Shooting with it wide open at T2 - the lenses look like Super Baltars without any added diffusion and with the convenience of a modern housing - "free spherical aberration" - looks great for certain things.
Stop down to a T2.8 - right back to being "Sharp" "modern" and Pretty clean.
quite pleased with this little thing.
Many lenses might not work because of rear cells being too deep - but for some purposes, really a useful thing in the toolkit.
When I have time (who am I kidding) I'll try to post some frames.