[bojan]

Ken,

Thank for the tips..This was roughly what I was doing...
Focus of the Solar disk is not easy to achieve, the focus ring on that Rubinar (8/500) is quite tight.

I think I will try to come up with some sort of focusing screen, to get it close enough for the start. F/8 will be forgiving for couple of 1/10 of mm difference in slit distance from lens focal plane (I hope..)..
The capture software (Free2X Webcam) is quite easy to use, and camera driver allows for adjusting exposure time (minimum is 1/10,000, just fast enough. Slit is also close to minimum width, I can't go much lower in order to avoid transversals).
I tried couple of codecs, MP4 results in lowest compression artifacts. Maybe video camera without compression is the way to go (that will be in the future).

Attached is one frame from AVI file, southern (or is is northern?) solar limb is nicely visible. Obviously, 5 mm solar image diameter is too large for Hartridge slit, so I will have to do couple of scans to capture the whole disk.
Anyway.. slowly getting there.