Originally Posted by smokarz
i see. how do i check to make sure the iris is off but not closed? is there even an option on the projector to close the iris?
For the 8350, the first menu screen (picture options) has the iris parameter towards the bottom. Three delicious flavors! Fast, slow, off.
I wish there was a selectable fixed value too. I love the concept of an "aperture" to help black levels (and if implemented properly, focus depth-of-field) but completely dislike dynamic irises. I suspect that in the elusive service menu there might be some reprogrammable parameters. I expect to find a service manual reference sometime after I take my first vacation on the Moon... :-)
Ages ago, I'd cut black circles to stop-down the lenses on my crt projectors. That and lens-striping to help side-to-side red/blue uniformity. The optics were such that you could do that. Ah... the good old days of stone tools.