Sigma 18-125 /F3,5-5,6DC

Zitat: The Sigma AF 18-125mm f/3.5-5.6 DC is naturally a bit of compromise solution but the overall package is actually quite sound especially when taking the low price tag into account. The lens is pretty sharp when stopped down a little and CAs are surprisingly low for such an extreme zoom. However, the vignetting could be a little better at wide-open aperture specifically at the 18mm and 125mm setting and the level of distortions is very high throughout the zoom range. Nonetheless these are viable compromises for a compact 7x zoom. The Canon variant of the lens showed a miserable AF performance on the EOS 350D but the Pentax K10D has obviously a superior AF module which can handle the task quite well although the AF speed diminishes significantly in low light situations - this may be very different on smaller or older Pentax DSLR with a less capable AF system so if you own one of these better check this aspect if you´re interested in this lens.

Zitat: The Sigma AF 18-125mm f/3.5-5.6 DC is naturally a bit of compromise solution but the overall package is actually quite sound especially when taking the low price tag into account. The lens is pretty sharp when stopped down a little and CAs are surprisingly low for such an extreme zoom. However, the vignetting could be a little better at wide-open aperture specifically at the 18mm and 125mm setting and the level of distortions is very high throughout the zoom range. Nonetheless these are viable compromises for a compact 7x zoom. The Canon variant of the lens showed a miserable AF performance on the EOS 350D but the Pentax K10D has obviously a superior AF module which can handle the task quite well although the AF speed diminishes significantly in low light situations - this may be very different on smaller or older Pentax DSLR with a less capable AF system so if you own one of these better check this aspect if you´re interested in this lens.

Zitat: A good DSLR zoom for the money.