I have a 1/4 inch foot for my Bernina, made by Bernina. I think there are feet you can purchase for you Bernina to adapt the feet of other brands, but they cost every bit as much as the 1/4 inch foot.
The Bernina foot sews right in the middle, both feed dogs are utilized and the seam sews straight. I love mine and won't sew on a quilt without it!
M