I don't use it because it's a pita to get on and off, but I'll need to consider it or some other way of covering the viewfinder. I use my red headlight to look at the counter and I've noticed in the shots that I do this to, I'll often end up with a pretty horrendous gradient in the image. It only just dawned on me the other night where it was coming from. Where I used to live has some pretty strong directional light sources and I always blamed them. Now I've moved to a site where the nearest light source (other than my own house) is about 200meters away and I'm still getting the gradient. I think I've only got myself to blame
