Help - Ultra-Wide lens for a Nikon D5000 - first time buyer

[Suzanne]

Keen amateur photographer with a Nikon D5000 who is keen to invest in a good Ultra-Wide lens ahead of a photography holiday to Iceland. For similar prices, am torn between a Uses Nikon 12-24mm f4 G AF-S IF-ED DX Lens (£750) or a brand new AF-S Nikkor 10-24mm f3.5-4.5 G ED lens £650. Anyone offer any help (I think I'd prefer a Nikon lens)
Am also keen to try using filters for longer exposures for silky water effects / waterfall / sea pictures / sunrise / sunsets. Looking for a good "starter kit" or some basic essentials but so many types of filters, I'm not sure where to start ....

[Thomas]

Hello Suzanne, and welcome to the friendly Camera Labs forum!
To enjoy your stay here please have a look at the house-rules!
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For ultra-wide on a Nikon DX body I'd suggest the 10-24mm! I once had a Sigma 10-20mm and the difference between 10mm or 12mm on the short end can clearly be seen.
As to your filter-Q: someone else has to jump in, because I'm not a filter-guy...