The glass is stopped down only enough to hold it on a shutter with black tape.
I created a number of apertures to go with my magnifying glass. It gives great coverage for 8x10, and stopped down to f-32 or so it makes the sharpness/softness a little more even across the image.
Great work!
Tom, on Point Pelee, Canada
Ansel Adams had the Zone System... I'm working on the points system. First I points it here, and then I points it there...