> One could always lock the mirror up, shoot in 'bulb' & do a timed
> lens cap off-on manuver, but that would move us back to the 1890's,
> wouldn't it 
>
> Sorry, just kidding, I had an instant flashback to one of those old
> western movies with the photographer removing the lens cap followed
> by a poof & flash of ignited flash powder!
I have actually done (almost) exactly that!
If you're doing the bulb and un-cover/re-cover the lens bit, locking
the mirror has no further benefit; by the time you uncover the lens,
the vibrations will have damped out.
I was doing a long-exposure study of a burbling brook - the "looks
like melted glass"; kind of thing - 15-30 seconds with closed-down
lens and neutral-density filter.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jim Saklad mailto: jimdoc%40iname.com">jimdoc
iname.com
