We cannot observe the Sun only by eye. We had to obtain the welding glasses. Some people with very good sight could see the Venus without telescope only with these glasses.
We had the camera and the cine-camera for the documentation. The cine-camera had digital zoom about 200 so we made a short film only with camera and welding glasses.
Then we observed the Venus by specular reflactor with the welding glasses or we sreened the picture on the white projecting screen. This way was the best and we could screen the picture of the Sun on the screen up to size of 25 centimeters.