Quote:
Originally Posted by Shiraz
no, there is nothing in front of the aperture. The ray diagrams just use a simple lens as the optical element to illustrate how an image is formed. The same thing happens with more complex real optical designs, but it is harder to visualise. Will try to put together something.
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Like a fisheye lens exposed to all the sky yeah but I just can't visualise how rays that are not near parallel to a closed tube optical axis will hit the mirror at the end of it, with baffles as well, etc... The few that hit the primary sideways would they even bounce to the secondary or miss it altogether?
