Its 25MB for gmail. But if you are sending a lot of images, just link a Google drive, dropbox, or other cloud.

You are specifically looking at big heavy lenses. Auto focus also adds weight and size, especially as the elements get larger.

I have 3 Voigtlander lenses for Fuji that are the smallest SLC lenses I have seen and they are quite new.

Probably not even that long of an exposure as the train would be moving quickly. The other train is keeping pace.

Or they just masked and did this in post.