Stalked up to 3 roe does at last light, I ended up not taking a shot, my guide said he could see clearly through his swarovski binos, all I could see was an indistinct blur, no amount of fiddling with the zoom or parallax helped. I don't think it was my Leupold scope, nor exit pupil (I tried at 3.5 x 40). I tried his rifle and that was no better. In the end I had a look through the swarovski binos and everything was still out of focus.
It's not like I have bad eyesight during the day, I am slightly shortsighted (-1.5) with a smidgeon of astigmatism, but corrected, at 6/6 (20/20).
Slightly disappointed, though glad I didn't take an iffy shot, even if I haven't shot anything yet...