I've got one of the recent lenses and it's fun! Wide open on 8x10 makes for super shallow depth of field, nice for certain portraits. It doubles as an objective lens for a wide field telescope (I use an old 50mm f/1.4 lens as the eye piece). I also use it in my classroom to illustrate the concept of relative aperture: just display a 50mm f/4.5 enlarging lens first, then put the 360 beside it. This will generate all sorts of good discussions. But I think Dan Fromm's advice is best. Put it on a board and make some images.
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