How many stop filter do you need to photograph the sun?
1..Protect your eyes and equipment by using a proper, visually safe solar filter to cut down the sun’s intense brightness and heat. Use a No. 14 welder’s glass filter or purchase special solar filters — made of aluminized polyester or black polymer film or metal-coated glass or resin — from reputable dealers such as Thousand Oaks, Astro-Physics, Kendrick Astro Instruments, and Orion Telescopes & Binoculars. Make sure the filter is securely mounted on the front of your telephoto lens or telescope.
Color-negative or slide film, smoked glass, ordinary sunglasses, Mylar balloons, space blankets, black plastic trash bags, CDs, and polarizing or neutral-density (ND) filters used in regular photography are considered not safe for solar viewing, and therefore should not be used.
Why so serious?
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