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You won't have to. In the long run, the optics and resolution will advance to the point where you never have to change lenses. Check out the CoolPix 8800. Moore's law applied to cameras. They seem to be pretty close now with component pieces. Shrink the sensor while increasing the resolution while holding the noise down. Then SLRs will be obsolete. No more worries about dust on the sensor, completely water proof to 100m and 8 fps all for $500.


We've had this discussion here before, but I think you are wrong. If you compare the 8800 to the current DSLRs you will find that it is hugely more noisy.

Because the sensors are so much smaller on the non-DSLRs the noise is always going to much higher that a DSLR of the same generation.
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