Do you take multiple exposures on one frame or multiple frames?
What time interval is used between exposures?
How do you keep the skier properly exposed without overexposing the background if you do one frame with multiple exposures or do you fix the background by post processing?
Is specialized software needed (other than consumer level photoshop)?
Is there a description published anywhere for the entire process from picture taking to image processing?
Thanks in advance for any advice.