see notes

Starshoot DSCI, 1 exposure, 60s 6/6/08 San Jose, CA

This is one of my first attempts at a deep sky object. This is a single exposure, processed using the MaxIm Essentials software that came with the camera. Therefore, the color conversion is different from the majority of images displayed here.

Imax=100	Imax=50	Imax=20

Starshoot DSCI, 16 exposures, 30s each 5/28/10 Palo Alto, CA

Another Ring Nebula, taken right outside our door, near a bright lamp and with a nearly full moon.

Imax=30	Imax=15	Imax=2

SBIG ST-4K, 540s total exposure 9/22/22 Lake San Antonio, CA

First 60s exposure sequence of the Ring Nebula. The seeing was not great, and also I lost a frame to a remaining bug that was causing the tracking to keep going after the shutter closed.

Imax=30	Imax=15	Imax=2

SBIG ST-4K, 600s total exposure 9/22/22 Lake San Antonio, CA

Another sequence of 60s exposures after fixing the tracking bug.

Imax=30	Imax=15	Imax=2	Deconvolved

SBIG ST-4K, 540s total exposure 9/23/22 Lake San Antonio, CA

One more sequence of 60s exposures I took because the seeing looked better than the previous night. Since the signal-noise ratio was pretty good for this image, I was able to get some useful sharpness increase using a deconvolution filter (right).