I don't agree about the marketing trick...

And even if you're right, hypotethically(sp?), then consumer film is not so concistent as proffesional ones....
A good photograher does not need to be a pro. A pro is just someone that earnes a living out of it. But a good photographer relies on what he knows and learned about a film. If he gets a complete different film. he
will experience trouble....

Sam