This is much better value than a conventional filter, promptly delivered, although the instructions were not great. There are two films on either side, one tissue and one clear. It is easily ripped and wrinkled so great care is needed when creating your filter. This started as a filter for my telescope and ended up as a filter for my binoculars! (it would have been a struggle anyway: an A4 sheet would fit less than 6 inch dia telescope, I estimate). It is a basic filter so good for sunspots, eclipses, transit of venus (if you can wait over 100 years for the next one, assuming there are no clouds) but will not show the sort of detail you might see in astronomy mag photos.