Tamron lens vs sigma lens

[Sophia]

I am looking for a multi-purpose lens for my canon camera i am searched and find out that sigma and Tamron are having good zoom lens which are specially made for cameras.I don't have much more experience with any of the companies, for that i have created a vote, i request you to please vote and give some information about Tamron and Sigma lens, so that i can buy it for me.

[Crona]

I would prefer you to go with AF18-270mm F/3.5-6.3 Di II VC it has latest 15X zoom lens from Tamron, the pioneer of high power zoom lenses, the high power zoom lens has steadily evolved from a 7.1X to a 10.7X to a 13.9X and now to the world’s largest zoom ratio of 15X by combining advanced high power zoom design technologies accumulated by Tamron since 1992. The lens covers an angle of view equivalent to that of a 28mm wideangle to a 419mm ultra telephoto with just one lens, letting the user capture once-in-the-lifetime images of panoramic landscape images or close-up pictures of children smiling, without having to get too close to the subject and without having to change lenses.

[Francesca]

Sigma lens is designed with the highest level of optical technology and augments its predecessor with the addition of the Hyper-Sonic Motor (HSM) ensuring a quiet, high speed AF as well as full-time manual focusing capability. Housed in compact construction, the Sigma 24-70mm is a large aperture standard zoom lens ideal for all general photography including portraiture and landscapes. Physically, the shortest lens in the category, its overall length is 3.7 inches/94.7mm. With excellent optics, this could be the foremost performing lens in the category with stunning speed, clarity and color.