This is a filter for photographing the sun, made for the solar eclipse visible in the UK on 20th March 2015. It push fits onto a Hoya UV(c) 67 mm filter, ( it should fit over any 67mm filter). Filter material came from http://www.amazon.co.uk/gp/product/B00DS7IFQS?psc=1&redirect=true&ref_=oh_aui_detailpage_o06_s00 I`m not sure if my 135 mm lens has enough magnification but it's the best I have at the moment. Let's hope it's not cloudy on Friday !