Sigma Mirror 400mm f/5.6

Sigma 120-400mm f.4-5.6 w/ OS Rules! Sigma has been putting out after-market lenses in the past 15 to 20 years which meet or beat the OEM lenses for which I have "invested" in, until recently. I have the best of Nikon lenses, to a price point. I admit, I've spent upwards to $1,700 for a Nikon lens, and have photographed with great success with them. But, I'm blown away as to the quality of the Sigma lenses in the EX and ART series. This 120-400mm is no exception. I've taken it out, in unheard of night conditions, and it performed like a champ. It was clear, sharp, had great contrast in low light, and produced. My sample photo is too large to attach, so find the photo on Flickr using photos/lavonnehing/50557016696/in/dateposted-public to see for yourself. Amazing! This is a 5 Photo panorama, composite, shot with this lens. My camera was a Nikon D810, yes fantastic in and of itself, but I know what the combo of great glass and my camera body can produce. Wow!Read full review

So far, a good purchase. As described. so far an awesome purchase. Will be taking it very soon on a couple of Photo Shoots..... I have great expectations.

Sigma 400 lens. Awesome lens, Fast focus and sharp. I love it!