Yes, the Medusa is definitely compatible with the Simplis - but don't order the Medusa cage on its own.
You'll want the Medusa add-on kit;
Cyclops/Medusa DSLR Cage Add-On
This is the add-on kit that we would suggest for use with our Cyclops viewfinder, but it actually works the same (and better!) with the Simplis plate.
If you have any more questions feel free to email myself (firstname.lastname@example.org
) or email@example.com
for a more direct and immediate response.