Colorfoto.de Universal zooms and fixed focal lengths on Canon EOS 20D and Nikon D70s

Almost all wide-angle focal lengths are expected for the small picture format. On average, your performance does not reach the level of the fixed focal lengths in the telephoto range. For most digital SLRs with an image sensor in APS-C size, however, newly conceived wide-angle lenses with a smaller image circle would be sufficient – as in the case of the three wide-angle zooms tested in issue 11/2005. (In the case of such fixed focal lengths with a small APS-C image circle, the manufacturers could reduce the correction effort for the edge regions and, instead, uncompromising lenses which are matched to the small picture circle can be realized . At present, the contrast is open, but also slightly dimmed, with many test candidates. A side effect would be lighter wide angles, since smaller lenses also reduce the weight somewhat. In the current test, the 30 Sigma is the only short “APS-C” firing range and also gets a purchase tip, but it can not convince in all aspects. On the one hand, the focal length is too narrow for a wide angle because the 30 mm on the digital SLR correspond to a 48 mm lens on a small camera. On the other hand, the vignetting, which is still visible even in the case of dimming, disturbs. Ideal would be a digital camera for interchange lenses, but without a mirror box with high-resolution electronic viewfinder. Without a mirror box, the rear lens could be closer to the CCD, and the elaborate and performance-reducing retrofocus of all wide-angle lenses for SLR models would be invalid. The wide-angle lenses for the Leica M cameras and the Hasselblad SWC, a special design that, like the Leica’s, do not rely on the reflex reflector to allow uncompromising wide-angle images