I want some new glass. problem is, Im a broke 15 year old with no job currently but a camera and an interest in filming (mostly skiing, maybe 10% photography when im bored). Stuff like this im on my own on... need some cheap alternatives (wont/cant spend 800 on a brand name lens). are opteka lenses any good? i have a canon 7d (it was my moms, i bought myself a d90, we traded because she liked the simpler nikon and the canon did 1080 video). specifically im looking for a fisheye lens. looking to get a job this summer caddying ($$$$$$$$$) but still unsure.
sparknotes: are opteka lenses any good? what are some cheap lens alternatives?