I regularly pick from a camera or lens with a - in my view - attractive price / performance ratio. This time I have a very special lens chosen, because all lenses with a fixed focal point within its zoom range manages to beat. Experts already know what lens I mean. He is not small, with a current retail price just above 700 euros not cheap, but his actions benne large. The Sigma 18-35mm f / 1.8 zoom lens Art is designed for use on a camera with an APS-C sensor and alone replaces a battery of fast lenses with a fixed focal length. That provides an incredibly good price / quality ratio on.
Sigma 18-35mm f / 1.8 Art: strong light, super sharp and top notch build quality
Why I chose this lens? First, the image quality (sharpness, vignetting, chromatic aberration) very well. The build quality is of a professional standard. On the internet I practice shots encountered where the image quality of the Sigma 18-35 mm f / 1.8 was compared with full-frame lenses. Usually, the Sigma 18-35mm f / 1.8 defeated the full-frame lenses. Not only with sharpness, but also with bokeh. If you compare our survey results with a focal length (all converted to full-frame equivalent, thus taking into account the crop factor), you will see that this lens beats also very expensive fast lenses with a fixed focal length. The international press has the Sigma 18-35mm f / 1.8 Art many times named best lens, so I thought to myself, "Let me give you as my colleagues for a time (as they have in this case) through with them do and the Sigma 18-35 mm f / 1.8 Art to proclaim Ivo's choice; the APS zoom lens with the best price / performance ratio. "
Buy a faster lens in place of a camera with a larger sensor
Photographing is catching light. If you have two cameras of the same brand compares: a camera with a large (full frame / full frame) sensor and a camera with an APS-C sensor that is half the size (in sensor surface), the largest sensor captures twice as much light as you both cameras (the same brand and same age) makes the same picture. Therefore, the camera has a large sensor (Canon 6D) a better signal to noise ratio than the camera with a small sensor (Canon 70D). That is reflected in the quality.
A bright lens also captures twice as much light as a normal lens. Sometimes even more. Replace an f / 2.8 lens with a fixed focal length of a standard kit lens (EF-S 18-55mm f / 3.5-5.6) by the Sigma 18-35mm f / 1.8 Art, is so much more light on the sensor the camera with APS-C sensor, you can choose a lower ISO value at the same shutter speed. And these lower ISO, get a Canon 70D just such a good signal to noise ratio as the Canon 6D. If you know that the Sigma 18-35 mm f / 1.8 is already super sharp from full aperture, while there are many full-frame lenses that are really sharp after stopping down one or two stops (so the ISO again 1 or 2 stops going up with a poorer signal-to-noise ratio as a result), then you realize just that you do not need from bad with a camera with a small sensor. It can connect a switch to a spare camera with a larger sensor.
Ivo's choices so far:
