My friend wanna get a new lens for himself, he is going for a multipurpose lens from sigma but than he is unable to make his decision and so he asked me for some advices.
He is considering this 2 lens.
1) 18-125mm F3.8-5.6 DC OS HSM
2) 18-200mm F3.5-6.3 DC OS
Any comments or advices for this two lens ? does anyone personally own this lens don't mind if you could tell me some pros and cons?
And i have another question, the 18-125mm F3.8-5.6 DC OS HSM is a much slower lens due to F3.8 but than it has a HSM, than again 18-200mm F3.5-6.3 DC OS has a F3.5 which is much faster but than it doesn't has HSM , my question is that which is a much faster lens?
i had already did some research in google but than i'm still kind of blur.
Sorry if i made a mistake or a error, i'm still a beginner too.
Thanks for your help in advance