Summary: It is an excellent lens at a low price. I've used it to take pictures over long distances and the quality of the photographs is great. It's my first experience with a Opteka lens and I think the product is worth the investment I made.
Summary: I have been experimenting recently with a number of different lenses for my Nikon D610 camera. For the price, this is a very worthwhile purchase. Of course, you need to be mindful of what you are purchasing.
Summary: A lot of people have negative reviews, but I disagree with them. Lens is made of mostly metal which is pretty amazing for the price. Lena size is big hence using of tripod is necessary to avoid out of focus pictures. This lens is my fav.