20 or 30 seconds is not quite long enough. I can spend more than 10 minutes with a particular insect. This shot was taken about one minute into a session with the insect:
http://www.worldphotographyforum.com...842&ppuser=472
this one was taken about six minutes later.
http://www.worldphotographyforum.com...719&ppuser=472
One minute apart on these two shots:
http://www.flickr.com/photos/overton...57600340691937
http://www.flickr.com/photos/overton...57600340691937
technique, technique, technique