What kind of lens bends an image without distortion?
To be more specific about my use-case:
If my camera position is fixed and unchangeable, but it's not pointing directly at my subject, then i want a simple adjustable optical piece that i can manually tilt in order to redirect the off-access image into the camera. It would likely be less than 45 degrees, with a relatively small adjustable range, say +-20 degrees.
i'm thinking something like a pentaprism would be the simplest solution. But, the image might be reverse or upside-down, so it's a matter of figuring out the correct polygon of the prism to ensure that the camera sees a correctly-oriented image. i'm wondering if a simple trapezoid would do. It might need to be a double trap, to correct the inversion.
Or, why not just a rectangular prism? Just a simple rectangular block of glass?
Or a short length of straight light pipe?
db3348 wrote: … the very notion of bending an image , and "deviating the image by an angle " to me implies distortion.
Light is free… capturing it is not!
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