Originally Posted by
corgan4321
So if focal length is the distance from the image plane to the "rear nodal point" of the lens when the lens is focused on an object at an infinite distance, with every single lens, focusing on a subject CLOSER than infinity will always require a greater amount of bellows extension?
So, what attribute of a lens dictates the curve the lens will follow in terms of distance from subject to necessary bellows extension?
Now, what attribute of a lens specifies how close the lens will be able to focus? Simply how close the nodal point can get to the film plane? So maybe the lenses coverage is what dictates this. For example, my Rollei TLR can only focus up to about 2 feet away. Could this be because if the nodal point of the lens got any closer to the film plane, it wouldnt cover the full 6x6cm?
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