I assume you meant in less than 1s. The alternative (for less than 1s) does not sound very attractive.

I needed to take a picture today and the only thing I had to hand was my Jolla. It took at least 12 seconds(!) to start the camera. I admit I did not time it with a stopwatch but after I waited for what seemed like ages I started counting in my head: "One elephant, two elephants..." The 12s was only from the point when I started counting.