since TS started question on the diameter...er..
is it true the bigger diameter enable more light to go in which gives a better final result?..
coz tat's wat i was told by 1 wedding photographer...
but i do agree that you're gonna hafta spend more on the filter, and if you're using a d40/d40x/d60 body with the sigma, the weight distribution is gonna be a little weird at first but you'll get used to it.
Don't own either, so can't comment on AF performance, but aren't both Sigma and Tamron abt the same size and weight? Why a weight distribution issue? Unless you mean the Sigma extends out a lot when zooming?
since TS started question on the diameter...er..
is it true the bigger diameter enable more light to go in which gives a better final result?..
coz tat's wat i was told by 1 wedding photographer...
cheers!
know what f2.8, f4-f6.3 and so on stands for?Dont trust wedding photographer nowadays. Most of them are small time part timers out to spoil a couple's big day.
By the way, does anyone in the thread know what is a f stop and how it derived?
Regards
Tamron for me.Noticed that many copies of the 18-50 Sigma lens have back/front focus issue.I have owned the Tamron before and I have nothing bad to say other than lousy build quality.
know what f2.8, f4-f6.3 and so on stands for?
F Number http://en.wikipedia.org/wiki/F-stop#Standard_full-stop_f-number_scale
so the Canon 24-70 L doesnt really have to be 77mm diameter...hmm.Yup. My point is... if we all know what F stop is.. then the diameter really doesnt matter.
And both Tamron and Sigma (at one point of time or another) has front back focus issues with many of their lens. Its really dependent on the QC.
Regards
so the Canon 24-70 L doesnt really have to be 77mm diameter...hmm.
i MIGHT be wrong, but i've seen a couple of my friends with the tamron 17-50, and the AF tends hunt around abit (even in decent lighting conditions) and isnt accurate sometimes? i use the sigma 18-50 and it doesnt face the problem.. Not too sure about IQ, but i think they're pretty similar, unless you start pixel peeping, which i dont.