yesterday I noticed this spot on my zuiko 12-40mm lens, besides other dust particles (I hope it's dust).
It's a bit visible after f8. I shot with f22.
I checked the lens last week and it didn't had the spot, I noticed it when I shot at a blue background and I saw a pretty big spot on the right side of the frame.
It doesnt have snowflake or spiderweb pattern, it's just round and I can notice a little hole in the middle of the spot.
Another detail, I didn't had the spot, last week for example, it just came from nowhere, so I think its just dust but the size and the color... I can notice it only at higher fstops
I hope someone can help me with an answer, is it fungus or just dust?
Best I could do at this hour and my useless smartphone ^^
Had to post here so its more visible, sorry for not replying, I know its not hight quality but yeah, I try my luck.
Also I can see further in the lens, with the flash, more spots like that but more transparent.