©2006 Laurence Chen, All rights reserved. This is thru a double pane sliding glass door so pretty darn good for Canon's DIGITAL ZOOM. Yes, amazing nowadays, isn't it? Color, contrast, and sharpness would all be improved by opening the door, assuming the subject would stick around for the photo shoot. Feeder and bird was about 15 ft. from my position behind the door jam. Swivel screen comes in handy here.