Finally got some CCTV lenses and adapter; a Computar 12.5mm F1.3 and Canon 12.5-75mm F1.8. Here they are with the Panny 20mm for reference: Here are sample shots to show the vignetting of both lenses using a 16x9 aspect ratio. First, the Computar: Next, the Canon 12.5mm: Finally, the Canon at 75mm: More sample pictures from the CCTV lenses at different aspect ration here. The Computar had to be modified to be able to screw all the way into the adapter. The Canon hasn't been modified, but it seems like it needs a quicky with Mr. Dremel to be able to focus to infinity at the wide end. Then again, maybe it is just the way it is as there is no focusing issue past the wide end and towards the tele end. Despite the vignetting on both lenses, I'm having fun experimenting with them. At $25 each, can't really complain. Actually, the Computar is currently my widest and brightest lens, so I'm happy with it.