Yes, it looks like a very good camera, well, here is a thumbnail rule, the max ISO for the device is related to the price max ISO/3 = price in USD for the basic camera, ouch. Talking of light related matters, here is one problem, nowaday, there are very powerful lasers that can cut through just about anything, I was thinking Suppose we have an apparatus of many lasers or maybe one reflected laser in such a way to produce an envelope of a curve, for example a caustic, the question being : can we arrange some lasers this way to actualy sharpen a knife 'perfectly' ? the thing is : what would be the perfect geometrical shape of a steel blade for example that would be perfect for cutting let's say vegetables or meat ? Is there a known geometry for what would be the perfect blade ? We know that there are those japanese sabre that are very good but they are made of many 'plys' of steel like 32768 since they fold the blade 15 times to produce a particular shape which is optimal in this case. Is there a definite geometric argument for this ? Best regards, Simon Plouffe