Will this work on my Nikon D3100?

Http://www.ebay.ca/itm/200876647743

I'm looking to get this stabilizer but not sure if its compatitble with my nikon d3100
if you know the answer please tell me.thanks!

Added (1). How do I know the thread length?

If your camera has a 1/4" tripod thread sure.

But you really don't need that if you know how to hold a camera steady. First use the widest lens you have for video, me it's my 18-55. Both help to hold down hand shake making it less visible. Then add this.
http://www.amazon.com/...004HD3G6Q/

A view finder, and I own one, will give you an excellent view of the screen in daylight and at night.
Total cost of this upgrade - $60 as opposed to what you're thinking about.

It should work.

I would also check out the X1 from Cine-rig.

It's $125 and all aluminium.

www cine-rig dot com