Hello, in August i purchase a Sony PMW-EX3, and before purchasing i want know what type of lens adaters there will be.

I know the PMW-EX3 comes with an 1/2" lens adapter, but i need a 2/3" for Zeiss "DigiPrimes" and a PL for "Zeiss MasterPrimes" or other lens for 35mm film.

Are there "Lost of stops" with this adapters?

You can get simple mechanical adapters made up by camera enigineers. www.lesbosher.co.uk and www.mtfservices.com are two in the UK. Or I think there will be adapter for Letus and RedRock type rigs if you want 35mm DoF.
Steve