In reply to moffatross:
Thanks for info.
> I love to learn from others so quite curious as to what filters you'd be using at dusk anyway (polarising or UV are pointless and will just rob your light), unless you're doing the long exposure sea or waterfall thing with a lee big stopper or some other ND ?
So do I! I'm still firmly in the beginner trial and error category having started last year, so I often don't know what, why, etc. I'm doing, sorry. Lots of learning to do. This week's lesson was a dirty filter causes a huge amount of light refraction/glare - I was trying to shoot the Forth bridges with their lights on.
I have a UV filter that I usually just leave on all the time as protection for the lens optics. Being down by the sea and having had the lens covered in salt spray in the past I was grateful for the filter on then. That and this time I was too late in arriving and light fading fast so removing the filter never entered my head.
Always happy to be guided by others with more knowledge. I've read that some say a uv filter is a waste of money as the chance of getting a lens scratched is really very low.