|
Did a couple of tests last night both guiding through a finder with a lodestar/phd and lunar tracking rate. I decided to use the lunar tracking rate. The moon is moving a fair bit over the fov from beginning to end just before midnight and passing the meridian when it exits the penumbra. Conditions and elevation are actually ideal for this one. Not unlike the 2014 one.
I'll be using a SONY NEX-5 on the FSQ106N with a tilt of -20 degrees on the CAA. The moon travels between Jabbah and Psi Ophiuchi so hopefully you can see the three stars around Jabbah at totality.
I'll be using 30s intervals and whatever ISO/exposure time suits the shot. From the last one in 2014 I find that 30s gives you plenty of time to refocus and recenter if needed in between.
I also found it difficult to focus at totality so it's best to focus while it's still bright and there are visible features on the disc.
From experience exposures were varying from a few 100ths of a second up to 5s during totality. This one's shadow is barely grazing the limb so I reckon the bottom of the moon might still be pretty bright or there will be some kind of gradient and a brighter part at the bottom.
|