Thinking about the Moon photography?
Watch this inspiring video:
The Moonshot by National Geographic Live
Let’s apply reverse engineering to the photograph.
Which lens is used to achieve such magnification?
I would use a full frame camera for this shot (35mm).
To get the Moon of this size the lens must be more then 2000mm.
Such lens covers angel of 2° the average angular diameter or apparent size of the Moon is 0.5°.
So the proportions obvious.
Through the proportion the size of the foreground objects and distance to them could be calculated.
BTW: Do you know that your little finger covers approximately 1° on a stretched arm.