The distance scale on my SMC Takumar 55mm f1.8 lens has stopped rotating when the focus ring is turned. I'm wondering if this can be repaired and if I can do it myself. I've never taken a lens apart before and am not sure how difficult it is to get to this part. There are 3 screws on that part of the body. If anyone has advice on how to go about it, please let me know. A short time before it broke, I heard and felt some mild crunching. When the crunching stopped the distance scale did too. I can get the scale to move if I put a little pressure on it while turning the focus ring. If I have to have someone else repair it, I would only want to spend about $50 because KEH has this lens for about $65 to $80.