I bought the 90mm macro a while back and it's a terrific lens. Recently I was trying to focus on a Spotted Lantern Fly ($%*!!) and I could not get it to lock focus. I checked the switch, moved it to different positions, and it kept hunting. This is was in good light during the day. It was a fairly low contrast setting with the gray flies against a gray tree trunk.
The following day I used it on some beetles and same issue, but entirely different lighting (bright daylight with sharp contrast).
I tried it again today on a coin in daylight and no issue.
Just wondering if anyone else has experienced sporadic focus hunting with the lens?
By the way, the lens is absolutely stellar for optical quality and is a great long portrait lens.
