Focal length does affect perspective .
No it doesn't. I don't know f the cheesy emoticon means you are being ironic or something, but focal length does not affect perspective.
Yes it does .
Focal length has no impact on perspective. Perspective is a function of distance.
Well, I'm talking about the picture. You can't shoot the same thing using different FLs from the same distance without changing your camera format.
Same distance + same angle (whatever FL and sensor) = same perpective.
But, same framing + different FL = different distance and perspective.
The FL doesn't matter only if you are photographing the perspective from a fixed position and you don't care about framing (for whatever reason).
FOV and framing has nothing to do with perspective, that is where you are going wrong.
If we change this "Same distance + same angle (whatever FL and sensor) = same perpective."
to this "Same distance
+ same angle (whatever FL and sensor) = same perpective."
Then you will be on the right track.
FOV and framing has everything to do with distance, which affects perspective.
You have a proven track record of wallowing in your ignorance, have at it, if you don't want to learn that is fine by me, I don't have the time to help all the people that want to learn let alone to be bothered with the people that don't want to.
For anybody else, the only thing that determines your perspective is your position, which is why you can get the same image with a 4mm lens with a phone as you can with a 35mm lens with your 135 format camera, stand in the same place and your perspective is the same, regardless of focal length or sensor size. Start moving, either with the same camera or a different one, and your perspective changes.
Well, most photographers (not snapshooters) are not just photographing the perspective from where they stand, they tend to frame their pictures logically, while looking for the best position, background and distance. Standing still and zooming your 18-300 lens won't change the perspective. But, when you have the image in your mind, then you have to choose the right FL and distance to replicate it using your set of tools (which has it's limits). Try using some primes, shoot an environmental portrait (or something where perspective really matters), then you'll see that you are changing the perspective by changing your lens (FL) and distance, while keeping the main subject. If you only change distance, then you change the whole picture (framing, perspective, DoF...). OK, you can skip the experiment, just google for "dolly zoom" or "vertigo effect" (used in movies) and learn how it is done and why.
No need for personal insults, have nice holidays