Jr. Woodchuckington Janitor III, Esq.
Originally Posted by tribble
I would definitely go with reducing the f-stop. At f/20 diffraction effects around the iris will reduce apparent sharpness. This may not matter for laser shows, but in general a lens' peak sharpness is a few stops down from wide open. My Canon L zoom glass appears sharpest between f/8 and f/10. Other lenses will vary. Wish my DSLR did video.
i set a high f-stop value because it's so hard for me to focus on the laser projection. f/20 is a pretty forgiving dof.
suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.
Senior Member
Good point.i set a high f-stop value because it's so hard for me to focus on the laser projection. f/20 is a pretty forgiving dof.Could you pre-focus with the lights on by putting a post-it note on your backdrop?
Jr. Woodchuckington Janitor III, Esq.
yes.
the other trick i do is to project a static circle at the beginning of my shows. this helps with size, position, and focus.
Good point.
suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.
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