Telescope:   Obsession

Mirror:         25" f/5 Galaxy Optics

Drive:           AZ/ALT, StellarCAT ServoCAT with DSC Argo Navis

Camera Equipment:   ST-10XME Class 2 CCD, CFW-8A, AO-7, Pyxis Field De-Rotator, TCF-S

Exposure:    Single 5 minute.

Processing:   CCDOPs, Photoshop 5.0 (Levels, Curves)

Location:   My backyard in Ridgecrest, CA (Mojave Desert), 2600 ft. elevation, population 30,000

Date:         5/31/05

Comments:   Looking northwest into skyglow. First thought skyglow was responsible for the vignetting, but later, John Mahony pointed out that the problem was due to the long train of equipment between the f/5 mirror and the CCD chip (Thank you, John!).  A reconfiguration of the hardware ( please see the equipment page ) seems to have corrected this problem.