My camera does support live view. That is what I was using while taking pictures from Foucault tests and during the second go with interferometer. I clicked handheld this time. I had spent so much time trying to clean the surface and remove parasitic fringes that I had very little time left to quickly take some igrams.
I had focused while looking at the fringes through the camera. The tip about aligning laser to reduce losses because of polarization should also come handy.
--- In firstname.lastname@example.org, "Vladimir" <vladimir.galogaza1@...> wrote:
> When adjusting interferometer and observing fringes it is possible, with some cameras, to
> do it via computer screen. If camera supports it, can be connected to computer (USB),
> setup in menu to "live view" and shoot by click on mouse and have the image immediately
> in the PC. With your camera I think it should be possible. Necessary SW comes with camera
> on CD.