Good luck today Nigel,
To anyone that
does need to 'break the rules' after the event; e.g. they have accidentally captured a wonderful cameo within a larger image, but it needs a severe crop to obtain a good composition (which will make the noise visible), I would recommend
Neat Image. It samples a blank area of the image, determines what the noise problem is on that shot and subtracts it across the image (I guess this qualifies as one of Colin's "fancy algorithms"
![Smile](https://cdn.cambridgeincolour.com/forums/images/smilies2/smile.png)
).
It works stand-alone, or as a plug in with most photo editing software (not 64 bit CS5 last time I looked though). It is also good for RAW shooting compact users, as I was when I got it.
Now I have a DSLR, it is true I don't use it often, usually only for the example given above, or ultra high iso shooting (e.g. 3200 and above), because, as Colin and Robin say, as long as a shot is well framed and well exposed when captured, noise
won't be a problem.
Cheers,