Eliott Mussi

Recently I bought a Canon EF 70-200mm f4 L IS II USM Lens in fantastic condition on eBay. However after inspection noticed some kind of residue or something within the elements of the glass? It doesn't effect the image but does raise slight concern. No sign of any previous fungus on the glass optics just this strange white residue around the edges. Does anyone know what it is, and if it's to be concerned about?

Hi, Does anyone have any idea how to clean fungus from the glass here? It's not on the shutter glass or the view finder glass but between them when the prism turns... It's a Bolex REX 4. Thanks

Fantastic, that looks about right. Thank you for your help!

Image attached.

Hi everyone, I recently bought my first Bolex REX 4 and decided to clean it the other day. Everything was going fine until I decided to remove the turret and the front plate under it. As I removed the plate I heard a nut drop into the camera. I have successfully removed the unknown nut from inside the camera but know have no idea where it goes. Please could someone help! I would rather first try and fix this myself and if not succesful then take it to get repaired. Thanks Eliott