>>2644418Let's say I don't mind distorted perspective.
Would it be valid for me to use trigonometri calculations to figure out how closer to the subject I needed to be to get a Head/Shoulder portrait with a 35mm lens?
The reason I want to know this, is so I can somewhat figure out how far a distance a 500mm lens would be able to give me.
Let's say I somehow gain a 500mm lens with a 4,1° horizontal angle.
The calculation would then be: 0,425/(tan2,05) = 11,9 meters
But I'm not sure if this is quite right.
Is it right?