Beetle on glass

Experimental shot - Here is a beetle from by-catch from Badlands National Park. The beetle is placed on a piece of glass and stack shot using our usual set up but with black felt on the rear of the glass to minimize the gray color that seems to come from light refracting in the glass behind the specimen. The image in the glass appears to become less focused the further it is from the ventral portion of the beetle. Will be looking at picking up some one way material for cars based on previous suggestions...Its interesting that you can look at the picture from two different perspectives with the specimen on a mirror of that you are looking at the ventral face of a different species