Re: Cannon GL2 longrange video question
I ran into this same problem. It seems like all the high quality cameras with decent sensors have max optical zooms of 10x and 20x. I found I can get decent results on critters at 1000+ yards with some of the nicer "camcorders" that have 35-45 optical zooms. They can be had for $500-$750. Granted you will be giving up some quality compared to your GL2 for any shots that are zoomed out. But if you want to see bullet impacts, and have the animal look bigger than a mouse on your screen, you really need the 40X zoom.
The other problem to consider if you decide to get a doubler for the GL2, is that when you zoom out there will be some form of vignetting.