dehowie wrote:
Maybe the lens isnt the problem but people expectations are.
The problem is that people expect a $1200 dollar lens to be able to function as well as a lens that is 5-6 x the price?
If you expect AI performance from a consumer grade piece of glass to match that of a 500II or a 200-400 i think your expectations are just a little bit high.
In short you want Ferrari performance for a Hyundai price tag..sorry aint going to happen.
I guess if you owned the lens you would understand better the situation at hand. There are several owners with a ton of experience that understand how AI Servo is to work............................
It\'s pretty simple: AI servo[edit]
AI servo is an auto focus mode found on Canon SLR cameras, although the same principle is used with Nikon and some Pentax cameras, known there as \"continuous focus\" (AF-C).[15] Also referred to as focus tracking, it is used to track a subject as it moves around the frame, or toward and away from the camera. When in use, the lens will constantly maintain its focus on the subject, hence it is commonly used for sports and action photography. AI refers to artificial intelligence: algorithms that constantly predict where a subject is about to be based on its speed and acceleration data from the autofocus sensor.
I understand this, maybe you don\'t?
Feb 12, 2014 at 05:35 PM
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