8.0 mm f/3.5
The fire and the fireball! Bright Earth-grazing fireball in Tucson AZ during Bighorn forest fire
The "clouds" to the north are smoke from the Bighorn fire that was lit by lightning on June 5 and is still underway. The gap in the middle is the click of the camera which is under .5 sec so calculation of line flight makes this at least 6 second transit across the field of view. This is a stack of 2 images. 2:11 am. A bright moon lights the smoke.
See American Meteor Society : http://fireball.amsmeteors.org/members/imo_view/event/2020/2786
Check out the Bighorn fire images: http://flic.kr/s/aHsmNJhXgA