8-10 Stop Neutral Density Filter?

I was looking to buy one but i don't which one, and they cost one around 50+ pounds, i would like to buy one for 20-40 pounds, i have a nikon d3000, i would like a screw on and filter for a 52mm lens diameter

Superdark and filters are rather a niche item, as a result they're only produced in small numbers, and to a higher standard than normal filters. This is why sometimes a filter like this will run into the £100 mark.

There's however an alternative, and it'll probably only cost you a fiver. The welding filter provides you with over 10 stops of reduction. Most of them are square or rectangular, and should be around 82 or 83mm in width, which fits a P-size cokin filter holder, a cheap off-brand one cost's £2-3, and a stepping ring for 52mm should be £2 too.

Have an explore of this group on flickr, it's dedicated to it.

I have one (B+W 10 stop filter) but so far i used it rather rarely… It probably would have been a better idea for me to get a 4 stop and a 6 stop filter and to stack them.
So… I'd advise against getting one unless you already have lower rated and filters that you use frequently.

Get a cheaply available nd8 (3 stop) get a reasonably cheaply available polariser (you should have one of these for your kit bag anyway) much more flexible than a single large stop and filter, and combined have a 5 stop factor, which is actually loads and loads and loads.

I have a B+W 10 stop and, it's great when you get it to work, but it is not without it's problems, such as dark viewfinder / live view, strong colour casts, the waiting for the long exposure, then the same again for the noise reduction to then see that your image is out of focus etc.

They can achieve excellent results, but there are other ways…

AVOID AVOID AVOID at all costs the fader type NDs. They do not have a uniform and effect across the zoom range (varies from 2 stops to 8 stops even on the same lens!) and can be soft at the telephoto end.

Stick with simple fixed filters. Faders are an expensive mistake and are unpredictable in use.

You won't get a decent 8-10 stop and filter for that money. You can get a welding filter - will almost certainly have a colour cast but you can remove that in post.

Do NOT get a fader filter - I fell for that & had to send it back - useless.

Or buy a 4 stop & a 6 stop - you might end up spending near enough the same amount, but 2 and filters would probably be handier.