Hi~! I live in South Korea and will be shooting a Chinese Conference this Saturday at a local University. This will be the first time I will be shooting professionally. If you shoot professionally youself, I'm sure you can remember how you felt before the big day. I shoot with the Canon 30D and am actually borrowing the 24-70L from a friend of mine. This is great b/c shooting at 2.8 will be a benefit indoors. The important Q's I need to ask you are: 1. Because of there being less light indoors, would you automatically shoot at 2.8 for all shots (group & individual) to get the fastest shutter speed possible? 2. Do you recommend taking RAW + JPEG's or just RAW shots? 3. I will be taking RAW'S, either way, so would you keep White Balance at 'Auto' or change it to 'Flash'? 4. Critically important question above all others - what shutter speed is 'essential' for this type of shoot - A Conference? The Conference theatre will not be as low lit as a church, but light will still be relatively limited. Some shots (group) will be posed. Others will be candid, such as a close up of someone speaking at the podium - and there being subsequent movement, of course. So, I think that for capturing shots with movement (without blur) I will need to be at 1/100 or 1/125 at least. What do you recommend? What is really great about preparing for this, in addition to your advice, is that I am going to the conference theatre beforehand to get a feel for the shots to look for and - most importantly - determine what camera settings will be essential. Everything will be determined before the shoot. What I am going to do is literally take shots at different ISO's until I find the minimum ISO that will give the correct shutter speed. However, I want to know what you recommend for shutter speed & aperture first. I'm going to the conference theatre tomorrow. If you can write back with your thoughts before tomorrow that would be awesome! Thanks! Your advice is invaluable. Colin PS - A lot of what I'm asking I feel like I know intuitively, however this will be the first time that I'll be shooting 'when it counts'.