project 4 : shutter speeds

this project consists of 12 pictures of the same subject at various shutter speeds. I had to use two different bike riders because the first one Celestino was too slow and i couldn't get a blurry subject with a sharp background so i asked oz to give it a try and ride the bike a bit faster, but after one minute he too got tired of doing wheelies and stopped. leaving me with no choice but to use both sets. the objective of this project was to promote shutter speed control and awareness. I set the sensitivity of my d200 to 400 ISO and switched to shutter priority all of the photos were taken in raw, then adjusted on photoshop. Nothing fancy just a bit of levels and contrast.
The picture that looks sharp is the one taken at 1/125sec. My favourite frame is the one with the border taken at 1/10sec, because of oz's sense of movement without blurring is facial expression which shows joy and excitement. with the fact that the background is slightly blur and ads to the sense of movement. i also like the fact that its not too cluttered with distractions as some of the other frames.
The picture settings are as follows:

1/6sec, f/22