I have a sigma lens (100-300mm) for my Canon camera. I had it less than a year when it developed problems interfacing with the camera. The symptoms varied, but were so severe, I would have to turn my camera off and back on to go to the next shot. That was almost four years ago
I set the lens aside as I couldn't rely on it. I finally paid to get it fixed last summer. They said they had to replace the microchip and I was told this lens can develop problems with the chip if it is dropped, or jostled too much. It cost me over $125.00 for the repair. Less than 4 months later, it started exhibiting the same problems. Having been told what caused the problem, I was especially careful with the lens, which was either in my padded case or on the camera while shooting.
It now sits on a shelf in my office. I am thinking of sending it back to Sigma with a note about how useless the lens is, and letting them know I will never buy another Sigma lens because of the poor quality of this one. Not that I really think they'll care. But I'll feel better...
I will be replacing the Sigma with a Canon 100-400mm in a few months, when I have the money.
While it is true I may have gotten one of the bad lenses, and Sigma may make some really great lenses, there is one more thing to consider. Will the Sigma lens work with all the features of the Nikon camera?
I have a wireless remote control for my camera. When using the sigma lens, the remote control, which works with the timer feature on, would not work. I suspect that any lens you purchase by the manufacturer of your camera will work with any feature of that camera.
BTW, I can personally recommend
B&H. They have great customer service. (I'm glad to hear
Adorama is highly thought of, too, as I am considering purchasing a digital camera from them.)
Good luck on your dream, maxwel9.
-Skittles