No-nikon lens copmpatibility for d5100?

I want a very nice wide angle and a fish eye for my nikond5100 but nikkor is like to expensive for my budget. If some one can give me recommendations for d5100 I appreciate.tripod, accessorys, flashes, and for video to.microphone, lights, etc. I'm a Noby. This is my first dslr camera. I like photography and videos. So any comment constructive is appreciate. ( my english is not that good ) hope someone can help me.

For less expensive lenses, try Tamron and Sigma. There's one thing you have to be careful about: your camera doesn't have an autofocus motor and depends on the lens to have an autofocus motor. The specs on the lens will tell you this; for instance, my Tamron 18-270mm PZD lens has an autofocus motor.
http://www.tamron.com/...ll_in_one/
You'll note that it says "For Nikon (built-in AF motor)".

When you find a lens that you think you like, do an internet search for a review on the lens.dpreview.com has some reviews as does kenrockwell.com.

As for the other things, tripod, flash, microphone, lights, etc., there are lots of blogs out there that can help. I wouldn't buy anything without getting user reviews like those found on Amazon.com.

Maybe a general education on digital photography would help. Try the courses at creativelive.com. They have one called the "Fundamentals of Digital Photography".