Hi All,

I’ve noticed persistent, faint transparent lines appearing in my recent macro shots as shown in this 2 photos. Do you have any idea what are they? Both photo are taken with EF 100 F2.8 Macro with SMC-3.

Thanks in advance for any insights!

Edited 56 minutes ago56 min by puttsk
Add more information about how the photos were taken

This is common. Straight, corkscrew, beads, all sorts of plankton, algae, and similar critters.

@Dave_Hicks Thanks for the response! That's help me clear up what I doubt about ChatGPT and Gemini. At first I thought that it should be some algae or plankton as you said but both kept insisting that those lines are scratch on the port.