okay, this is really what i wanna know about 2.8 lens.
okay i know its faster. simple explanation: as you can go down to lower aperture (2.8 compared to 2.5 and above) , you can use higher shutter speed to freeze the motion.
HOWEVER, i have 3.5-5.6 lens and its fast enough to stop the motion. i can use speed up to 1/500 in the afternoon and it can freeze the motion of taxi.
so why do we need 2.8??? like freezing the speed of sport car?? and how much faster is 2.8 really??
i am also confused about 2.8 aperture VS VR (vibration reduction).
people said, with VR, we can shoot objects in low light situation. okay, i get the logic.
because when there is low light, you want to make your shutter speed lower to allow more light to come in. but as you lower your speed, and if you shake your hand while the camera taking pics, then you will blur the image. in this case, VR will negate your hand movement. okay, i got it.
but technically 2.8 can do the same thing then but in a different way ofcourse.
2.8 can allow you to have lower aperture so that you have more light to come in.
so in low light situation, which one is better then?? 2.8 or VR?? this is so freakin confusing.
please enlighten me everybody as i really need to know this to upgrade.