50mm "Normal" Lens... Ok, but "Normal" on FF or APS-C Sensor?

Started Nov 10, 2012 | Discussions thread
Lee Jay Forum Pro • Posts: 51,893
Re: 50mm "Normal" Lens... Ok, but "Normal" on FF or APS-C Sensor?

jrtrent wrote:

The article on perspective you refer to, even using its artificial environment with no background elements, confirms rather than debunks what Tamron said. Compare pictures A and C, taken from the same distance.

The 33mm lens makes the objects look smaller and farther away from the camera while the 80mm lens makes them appear bigger and closer.

Bigger and closer, but with the same relative positions.

Picture B crops the 33mm picture to the same angle of view as the 80mm picture, so naturally the size and distance now appear the same.\

Right - because it's not the lens that changes the relative positions of the objects, it's the shooting position that does - exactly contradicting what Tamron said.

Tamron is claiming the focal length is what changes the perspective, which is dead wrong.  A change in shooting position is what changes it.  That's why a synonym for "perspective" is "point of view".

Focal lengths and lenses have nothing to do with perspective beyond the possibility that a change in focal length will force you to change your shooting position to get the same framing.  But it's the change in shooting position that changes the perspective, not the change in focal length.

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