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roineust
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If i put a rotating stick behind lens of several types, so the stick center is behind the lens center, will the stick edges always appear to move at the same rate as areas closer to the stick center?
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Any possible lens?roineust said:If i put a rotating stick behind lens of several types,
What is "rate"? Angular velocity? Instantaneous or average over a cycle?roineust said:so the stick center is behind the lens center, will always the stick edges appear to move at the same rate as areas closer to the stick center?
A.T. said:Any possible lens?What is "rate"? Angular velocity? Instantaneous or average over a cycle?
roineust said:What is the case for all the options that you have mentioned and for all main different types of lenses?
roineust said:What is the case for all the options that you have mentioned and for all main different types of lenses?
So what's the point of the rotation?roineust said:... even if the stick is not rotating...
A.T. said:So what's the point of the rotation?
Do you mean more curved than when not rotating at the same orientation? Are you asking about signal delay of the light rays due to the optical density of glass?roineust said:Correct, my question is also about the rate: Does there exist a lens type, in which not only the stick does not appear to be straight, but it even seems to be more curved at the edge, as a result of rotation, be it when looking from the side or from the center axis?
A.T. said:Do you mean more curved than when not rotating at the same orientation? Are you asking about signal delay of the light rays due to the optical density of glass?
So no rotation then?roineust said:I am asking about such a phenomenon existence twice, once as a result of only the density of glass and again as a result of only the geometry of the glass.
A.T. said:So no rotation then?
You already know that lenses can distort things. The rotation can create distortion due to different light travel times from different parts of the stick. But these are tiny non-noticeable effects at non-relativistic speeds.roineust said:As a result of rotation and also when there is no rotation.
Here's another example of a question that's so open that it just can't be answered usefully. We all read it slightly differently and so we can all come up with different answers. Wouldn't a DIAGRAM or even a selection of ("several") diagrams help us all to be talking about the same thing that the OP had in mind?roineust said:If i put a rotating stick behind lens of several types,
sophiecentaur said:Here's another example of a question that's so open that it just can't be answered usefully. We all read it slightly differently and so we can all come up with different answers. Wouldn't a DIAGRAM or even a selection of ("several") diagrams help us all to be talking about the same thing that the OP had in mind?
For a start, what is the axis of rotation of the stick?
Is the lens rotationally symmetrical around the view axis?roineust said:if such a phenomenon happens in lens, first with no stick rotation
A.T. said:Is the lens rotationally symmetrical around the view axis?
Brilliant, thanks. As they say "a picture is worth a thousand words". Sorry to be grumpy.roineust said:Here is a diagram
The number of lenses used in an imaging setup can affect the resulting image of a rotating stick in several ways. First, more lenses can provide a clearer and more detailed image by reducing distortions and aberrations. Additionally, the placement of the lenses can also affect the magnification and orientation of the image.
The best lens setup for capturing a clear image of a rotating stick will depend on various factors such as the speed of rotation, distance from the stick, and desired level of detail. Generally, a setup with multiple lenses, including a high-quality lens with a fast shutter speed, can produce the clearest image.
Yes, a single lens setup can effectively capture a rotating stick. However, the resulting image may have distortions and lower quality compared to a setup with multiple lenses. The use of a high-quality lens and adjusting the shutter speed can help improve the image quality.
Motion blur can be minimized by using a fast shutter speed, which will capture the image in a shorter amount of time and reduce the chances of capturing a blurred image. Additionally, using a tripod or stabilizing the camera can also help reduce motion blur.
While specialized lenses, such as telephoto lenses, can be beneficial for capturing a rotating stick, they are not always necessary. A setup with multiple standard lenses can also produce clear and detailed images. Experimenting with different lenses and settings can help determine the best setup for a specific situation.