Welding glass is designed to reduce UV, IR and visible light by significant amounts and is available very cheaply in a range of different shades. 4”x3” sections of the standard types are available for around £2-3 (from welding suppliers & e-bay...), these should fit in a Cokin P holder. I've only seen shades 8 and above, but I've never looked for the lower numbers. Optical quality is NOT controlled but is usually reasonable, if you need a guarantee of optical quality '10 stop' filters can cos…
Travel, album created on November 17, 2013
8 items in total.
Architecture, album created on October 15, 2013
15 items in total.