First of all, you are going to want to measure your exsisting camera strap. Double that measurement and then add half an inch. You will cut your fabric and your fusible fleece to the doubled + 1/2" measurement. Cut your fleece, 1/2" shorter than your fabric.Fuse the fleece to the back side of the fabric, centering it so that each on each short end, the fabric will be 1/4" longer than the fleece. Before you actually pin the right sides togehter, fold the ends of the fabric over the fleece and stich down. This will give your ends a nice finished look. Then, pin right sides together and sew a scant 1/4" seam all the way along the long side. You can see the fabric folded over the fleece here. Using a large safety pin, turn your strap right side out.
Slip it on over your original camera strap and enjoy! I dont have a picture of it on my camera yet. Seems to be a difficult picture to get.