milozauckerman said:What, exactly, is the difference in "amateurs and semi-pro" users and "pros"? I'm not a professional, but I daresay my scanned 4x5 negatives are as large as what most 'pro' users work with under most circumstances. Likewise, consumer digital SLRs produce files roughly the same size as pro dSLRs in RAW form.
The correct distinction would be that an amateur is someone who does it just for fun, and a professional is someone who makes his or her living doing it.
For software, that would affect the price (how much can I spend for something I do just for fun, and how much for something I need to make more money), and software for amateurs would try to get reasonably decent results for an inexperienced users, while software for professionals would try to get best possible results in shortest possible time for people who are willing to invest time into learning to use the software.
But things like a "MacBook Pro" use a completely different model; a "Pro" computer is just more expensive and more powerful. A professional writer who makes his living writing books doesn't need a powerful computer; someone who wants to convert his 200 DVD collection to H.264 just for fun does.