The feeders are set up just outside the back of my garage where I am exiled with laptop, pipe and coffee to keep me amused. In better weather the window opens on a pivot, allowing a narrow vertical strip to shoot with camera mounted on tripod. This on is through very clean glass- I'm not that hardy with snow on the ground although with heavy rain as i type, I doubt if it will be there in the morning! The 70-200mm f.28 sigma is used with the hood touching the glass which seems to work well - just a large filter!