They say comparisons are lagging. Criticism writers in the media go to great lengths to compare the Sigma with other cameras on the market, but really it does not. I was looking for a camera always with you, problem certainly know many. Sigma I have known for years (SD9,10,14). As the full-format hit the market, I have struck in the form of the Nikon D700. Great camera, but large and heavy. Spoiled by the pictures, it was a long search for a suitable 2nd camera. Nothing pleased me and I myself from the marketing promises. When the Quattro just appeared in the media, my heart beat faster. A camera against the tide, every newspaper, every item in the network has been "studied". One can thereby scheckig laugh. From "Schitt" to "breathtaking" everything was represented. How do you compare apples with pears also. If you read carefully and between the lines, then a certain Mießmache can be seen quite. Very few were fair, to which I have supported me. Why so much bias? I have the camera and will not list here the advantages and disadvantages, will make others and has been done. I can only say who varies and is torn, can be accessed at ease. He should be in the camera but only the search that a camera in the traditional sense makes: Simply brilliant images. In the 100% view it took me framed by the "chair cut". Auschnittvergrößerungen no problem, you can save quite a medium telephoto. Make time, I do not know where the testers take their Klugheiten, I measured, almost a second and a half with focus. I have worked with manual focus (Nikon), as the Quattro is fast for me. And the images? Who gets by with low ISO values, can confidently use jpgs and saves the work with the software. This is not to argue against RAW, but not every image is a work of art and must be edited. Incidentally, one should always take Raw and jpgs together, the Raws of Sigma there anywhere preview, so you always have a "preview" here. In short, I am thrilled and rate each on who simply just want to make good photos. By the way, I noticed through out the small imperfections, but they are to get over, if you can handle it, also they make the little piece of technology lovable.