General model information:
Textures
2 Texture sets: 4K Textures for the optics model, and 512 for lens.
I also included 4K textures for Unity and UE4.
Model Format:
FBX
obj
dae
blend
marmoset toolbag scene.
BLEND (Blender, filesize: 370 KB), OBJ (OBJ, filesize: 244 KB), FBX (Autodesk FBX, filesize: 463 KB), DAE (Collada, filesize: 411 KB), TBSCENE (Marmoset Toolbag, filesize: 6.22 MB), TEXTURES (Textures, filesize: 116 MB)