A printable Chimney style View Finder, for the Lomography Konstruktor SLR camera. Using a cheap Loupe from Utrecht, and these 3D printed parts, you can make your own. 
The magnification is a little less intense than the standard view finder loupe, but you can now see the ENTIRE frame brightly, instead of just the very center. Also because the whole top is closed off less light leaks in making for a more contrasty view. 
Here is a link to the Loupe I broke apart to get at the magnifying glass: 
http://www.utrechtart.com/Testrite-Seerite-1in-X-1in-Linen-Tester-MP22071-i1007896.utrecht