Al really came off the rails on this one. As indicated by others, it has a terrible orange band at the edge, and yes you can reduce it quite a bit ... by holding your eye at exactly the right place. Its very similar to the movement constrictions of a 55mm Plossl. What good is edge correction (that is only a bit better than the 35 Panoptic) if it forces you to hold such a strict eye position to use it? Plus, eye relief is dismal, and at $620 it is a total disssapointment. Get the 35 Panoptic and the 22 Panoptic for only $25 more than the price of this single bloated overweight money sucker. Just look at the specs and then plot the FOV, Im loosing less than 4 arc. min of FOV to the 31, with a 35 in my 20 Obsession. Look at the reviews for the 35 and 22 Panoptics.