Eye Lens Nikon
how to make a fish eye lens for nikon?
I have a Nikon D3000 and I heard that you can make your own without spending money. So, how do I make it? 
Thanks!
A nice question, and something (to me at least) new!
I assume this is for fun because home made fisheye lenses are not much in the quality stakes. However check out the link below: It is a link to Instructables.com after searching fisheye lenses. You always have to buy stuff but 10 or 15 pounds isn't a lot for the fun you'll have.
I use a front of lens fisheye bought in the 70's they are still available on ebay for about 30 to 50 pounds.
If you use photoshop a handy trick is the spherize function (Filters - Distort - Spherize), Take a wide angle shot and make a fake fisheye picture using this filter push the slider to the right to create a stronger effect. If you use a fisheye lens and have that nice round image, you can 'un-spherize' it by pushing the slider to the left it becomes squareer. The quality is bad in the corners but I'm assuming this is just for fun!
Good luck and I hope my answer helps.
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Nikon 10.5mm f2.8 Fish eye lens sharpness test
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