Just playing with a 300mm Imagon on an 8x10, trying to figure out the differences between the h/stops and f/stops...

With the factory h/9.5 disc, "soup strainer" holes open:



With conventional f/stops at f/9:



And because I just couldn't help myself, wide open (f/5.8):


I went with a bit harsher light than I usually do, as that's where the Imagon is said to work best, but I don't see that it needs that situation any more or less than other soft lenses.

At h/9.5, the aperture has a wider "overall" diameter than the f/9 aperture, but the outer area is lessened in its effect as it is a series of small holes. Most of the h/9.5 aperture area is the smaller central area, and you can see it has a deeper depth of field than the f/9 The f/9 has a bit more "glow" around the highlights too, (see the back edge of Audree's hand), as the shallower depth of field allows the aberrations to show more, especially around the highlights.

Sadly, the h/9.5-11.5 disc is the only h/disc I have. I'd like to play with the others someday.

Strange lenses, these Imagons, but I like them...