I bought this to use with my Pentax K20D dslr camera. I needed to get closer to some images in the yard and for future use. I love it I sat on the porch and took pictures of the gold finches eating about 15 to 20 feet away. The pictures turned out perfect,it was like I was right next to them. I have had a manual slr camera in the past and used a 500mm lens, the lens bulky and heavy this lens is lightweight and easy to use.I would recommend this lens to anyone one who likes to get close-up and personal to their subjects.