For photography newbies, they should look up many of the available camera taking resources and tips on the web. But are some comments after browsing some of the replies on this thread:
ASA/ISO - same thing. ASA= American Standards Association. They use it as a guide for film speed (you know, when you buy film you can buy with different speed). You should use the term ISO more widely though, since it is internationally known. I don't quite know how they got the numbers for this, but they relate to how much light is needed to properly expose the film. The higher the ISO rating, the less light needed. Eg. ISO 200 requires half as much light as ISO 100 to properly expose the film.
So, all it does is give you the control over what aperture or shutter speed to use. Since we have a digital camera, this rating is a guide (it is estimated). Many digital camera reviews have said that the Canon ISO value of 50 is really actually ISO 100 - Canon picked 50 probably for marketing purporses. If you have a low light situation, cranking up the ISO will crank up the sensitivity of the CCD sensor and thus produce more noise in your shots. However, it allows for faster shutter speeds (less light remember?) and so will make your pictures look sharper since your hands won't have to be too still (unless you have a tripod).
As for blurry pictures on the macro - the macro range on this camera is not very good. Try focussing from a farther distance back. The best macro I've seen is by Nikon digital cameras. You can go as close as 1-2 inches! Amazing results.
LS20 - you are right. The field of depth isn't very good at all compared to real cameras... dunno why. Maybe it's the size of the lens that plays a part in this.
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