ASTRO: Sh2-112 in halpha under good seeing (~2.3")

Usually the hot weather we have been having in northern Calif brings steady
seeing if you can get transparency

This year is no different but the fires have wiped out the transparency

Today we got a weather change bringing the Pacific flow onshore and with
that some clearing skies and nice seeing.

I say "clearing" skies: we have a long way to go... The moon looks orange
for example.

But tonight I tried the 18" cass again with the Proline 9K. This time I ran
unbinned.

I was measuring 2.1" to 2.4" on the best subs and that is at 20 minutes
exposure at 5760mm focal length (image scale of 0.43"/pixel)

this is 200 minutes total using a Baader halpha filter

http://www.narrowbandimaging.com/sh2...er_ha_page.htm