Solar Finder for hot shoe on camera for solar and eclipse photos

If you plan on taking photos of the sun, especially during the eclipse of the sun, you don't want to look through the viewfinder to locate the sun and burn your eyes out. So you need a "solar finder". There are lots of these for telescopes, but this one fits in the hot shoe (where the flash goes) on your camera. The sun shines through a small hole in the front and makes a dot on the angled part. When the sun shines in the center of the circle, then the camera is pointed at the sun properly.