Quote:
Originally Posted by rogerg
If you try with & without the focal reducer I would expect even if it's field rotation it will look less noticable without the focal reducer because you'll be looking at a narrower FOV. I might be wrong, but that's what I'd expect.
Roger.
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Yes, without the FF you will need a longer exposure for the same effect to show up.
BTW, see the thumbnail for an example of FF distortion.