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).

Imax=20

Allied Vision camera with C14 at f/7 using filters, 900s total exposure 7/17/24 Palo Alto, CA

This was a first try at imaging with the filter wheel. The above image incorporates 30 x 10s exposures for each of three filters: H-alpha, OIII, and a light blue color filter, displayed in the image as red, blue-green, and white, respectively. The purpose of the blue filter is to show the star locations, but the intensity is such that the stars appear dimmer than in the RGB camera photos above.