>>3261774Just did my second shot and waiting til nightfall.
While waiting for that, I'm going to take the information of the first two exposures and add up the stops that it actually needed.
I used my DSLR with the settings at M f/29 1/2 at the bulb viewing via lcd screen to determine how many stop more does it need.
After about 20 min I realized it had to be about 7 stops but there's one problem. The iPhone light meter app can only as high as f/512 at 6 stops above f/256.
So looks like I'm have to do a little bit of math to find about what's one stop about f/512.
