The Difference Between Focal Length And Focus Distance
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- Опубліковано 3 чер 2023
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I love how you used shots from Killers of the Flower Moon
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would have been nice to mention macro lenses in this context
Dumb question alert:
And I’m sure it’s all personal preference,
But Is it better to use higher focal distances with longer lenses, and shorter focal lengths with wider lenses? Or does this depend on the specific model of lens used to achieve a desired effect? Or does it matter at all? 😅
I know very little bit I don't think it would matter. I'm curious to know if there is a point to it though
Most significantly with a wide lens and short focus distance you‘ll get a certain distortion of proportion of faces (especially noses get much bigger in relation to the rest of the face and ears disappear out of sight) and the background seems far away from the subject and small. Imagine that the field of view of your lens is similar to radial lines (like from a spot lamp).
With a telephoto lens and long focus distance you‘ll get more or less a good front view on things without much distortion of proportion and the background seems very close in certain cases and big (a moon rising behind a house and is almost as big as the house). Imagine that the field of view of your lens is similar to parallel lines (like from the sun light).
good visual example:
ua-cam.com/users/shortsTL9-eTkDGjk?feature=share
@@brennholzvermieter Perspective as you describe it doesn't have to do with focal length but only with relative distances. Focal length only affects magnification and thats it.
@@DimitrisPapadopoulos1980that isnt entirely true, the magnification does change however as a result of this the face as an example subject appears flatter and larger due to the curvature change of the lens as the focal length increases. This is turn also makes it seem as is the background is way closer and tighter in frame than it would on to the human eye. Take for example if you were sitting in a car talking to someone, the background would appear wide however, if you were to use a camera with say a 50mm or 75mm lens in the same angle and adjusted so the subject has the same framing, the background appears closer. This is often used to create tension or make scenes appear more personal in films and TV. So yes, lens distortion is a very real thing and is a reason as to why lens choice is so important.
@@DimitrisPapadopoulos1980 Yes and no: I presupposed that the subject appears with the same size on the sensor/image. You can achieve the same perspective/proportions for your subject with a wide lens when you’re standing far away as you achieve with a telephoto lens while standing at the same spot. However, the subject in the image shot with the wide lens will disappear in the background while the subject in the image with the telephoto lens will still fill the frame. The way I described it, was with a practical approach in mind - for the daily use of a photographer.