TIPS FOR TAKING PROPER SAIL SCAN PHOTOS
Investigating your sail twist profile with onboard imagery
First, position your camera(phone) at the mid‐foot area of your sail. Angle your camera to catch all three draft stripes from luff to leech. Usually the bottom stripe will have one end in a corner and the other end in the opposite, higher or lower corner of the frame.
To get a good angle of your headsail, you'll need to get down to deck level, so lay on your back and shoot up from the middle of the foot. (Hopefully a friend is driving, especially if it’s choppy!)
To get a good image of your mainsail, you'll need to position your camera so the angles are similar, and at the same time try to include the center of the boom in the bottom of the photo to assure you are in the right place. This will help us calculate the twist profile when the photo is measured by your sail expert.