Ja that seems about right. In my little experience, a half day of location recording is always more than half a day, what with travel, set-up and breakdown time when going onto set. But I always charge 2/3 or 66.6666...% of a full day for a 'half-day'.(Maybe I should up my half-day rate to 75%?)
I'm trying to break into the sound design world now, and here the situation becomes more murky. How do I charge? Per hour? Per day? Flat rate on a task for task basis? Don't really know yet? I've tried talking to my lady( a freelance photographer) about it and we never seem to reach a point, as she has the same difficulty.
What do you think a good model for post is? Let's say doing sound design on a 20 second channel ident, for instance?
Sorry about the 'question-for-question' thing...