Filter Lens Set

Filter Lens Set
Can you view the Sun through a telescope with aluminum foil over the lens?

During the Transit of Mercury a few years ago, an Astronomy professor on campus had telescopes set up. Some were set up to project an image through the viewfinder onto a white sheet, and some had filters over the lens to view it directly. I wanted to try this with my own refracting telescope, and I swear one of the “filters” he was using was simple aluminum foil. Problem is, I can’t find ANY info. out there on whether this is safe or not.

No. Sunlight will not penetrate aluminum foil. What you probably saw was a solar filter made from Baader AstroSolar film, which is a special polymer plastic coated with a reflective metal coating. This looks a bit like foil, or the material they make PopTart wrappings out of, but it is not the same. PopTart wrapping (or similar) does not block the damaging infrared and ultraviolet radiation and should not be used. Baader film is available in many telescope stores, or from Baader in Europe and Astro-Physics in North America:
http://www.baader-planetarium.com/sofifolie/sofi_start_e.htm
http://www.astro-physics.com/

This is absolutely the best material on the market for white-light solar filters — don’t risk your eyesight with anything else! It is quite inexpensive, especially if you share a piece with several friends.

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Minolta RF 1600mm F11 MD Reflex Lens. Filter Set. Hood. Hood Cap. Case


Minolta RF 1600mm F11 MD Reflex Lens. Filter Set. Hood. Hood Cap. Case


$7,200.00


LEICA ELMARIT-M 24 mm F 2. 8 ASPH Silver +  Lens Hood + E55 Filter + Finder Set


LEICA ELMARIT-M 24 mm F 2. 8 ASPH Silver + Lens Hood + E55 Filter + Finder Set


$4,500.00


Canon TS-E90mm f/2.8L Fixed Prime Digital SLR MACRO Lens + 64GB Filters Set Kit


Canon TS-E90mm f/2.8L Fixed Prime Digital SLR MACRO Lens + 64GB Filters Set Kit


$2,213.95


Nikon AF-S NIKKOR 28-300mm f3.5-5.6G ED VR Lens + 77mm 3 Piece Filter Set (UV, C


Nikon AF-S NIKKOR 28-300mm f3.5-5.6G ED VR Lens + 77mm 3 Piece Filter Set (UV, C


$1,940.00


Nikon AF-S NIKKOR 16-35mm f4G ED VR Lens + 77mm 3 Piece Filter Set (UV, CPL, FL)


Nikon AF-S NIKKOR 16-35mm f4G ED VR Lens + 77mm 3 Piece Filter Set (UV, CPL, FL)


$1,805.00


Nikon AF-S NIKKOR 24-120mm f4G ED VR Lens + 77mm 3 Piece Filter Set (UV, CPL, FL


Nikon AF-S NIKKOR 24-120mm f4G ED VR Lens + 77mm 3 Piece Filter Set (UV, CPL, FL


$1,805.00


Nikon 15mm f3.5 Ais  #187846 .........  W/Case,4 filters Set,Caps


Nikon 15mm f3.5 Ais #187846 ……… W/Case,4 filters Set,Caps


$1,800.00


Nikon AF-S NIKKOR 28mm f/1.4E ED Lens (20069) with 77mm Filter Sets + 64GB Kit


Nikon AF-S NIKKOR 28mm f/1.4E ED Lens (20069) with 77mm Filter Sets + 64GB Kit


$1,796.95


Nikon 24mm F/1.4G ED AF-S Wide-Angle Lens with 64GB Filter Sets Bundle


Nikon 24mm F/1.4G ED AF-S Wide-Angle Lens with 64GB Filter Sets Bundle


$1,796.95


Canon 16-35mm 2.8L III USM Lens + Flash + Color Filter Set - 64GB Accessory Kit


Canon 16-35mm 2.8L III USM Lens + Flash + Color Filter Set – 64GB Accessory Kit


$1,731.99


Canon 16-35mm 2.8L III USM Lens + Flash + Color Filter Set - 32GB Accessory Kit


Canon 16-35mm 2.8L III USM Lens + Flash + Color Filter Set – 32GB Accessory Kit


$1,727.99


Canon 16-35mm 2.8L III USM Lens + Flash + Color Filter Set - 16GB Accessory Kit


Canon 16-35mm 2.8L III USM Lens + Flash + Color Filter Set – 16GB Accessory Kit


$1,725.99


CONTAX RANGEFINDER ZEISS STEREOTAR C 35MM F3.5 LENS SET +VIEWFINDER +FILTER MINT


CONTAX RANGEFINDER ZEISS STEREOTAR C 35MM F3.5 LENS SET +VIEWFINDER +FILTER MINT


$1,495.00


Contax G Carl Zeiss T* Hologon 16mm F8 w/Finder Filter Case Set for G1 G2 Mint


Contax G Carl Zeiss T* Hologon 16mm F8 w/Finder Filter Case Set for G1 G2 Mint


$1,524.70


Canon EF 24105mm f4L IS II USM Lens + 3 Piece Filter Set + 4 Piece Close Up Macr


Canon EF 24105mm f4L IS II USM Lens + 3 Piece Filter Set + 4 Piece Close Up Macr


$1,480.00


Nikon AF-S NIKKOR 58mm f/1.4G Lens with 72mm Filter Sets Bundle


Nikon AF-S NIKKOR 58mm f/1.4G Lens with 72mm Filter Sets Bundle


$1,446.95


Nikon AF-S 24-70mm f/2.8G ED + Flash + Color Filter Set - 16GB Accessory Kit


Nikon AF-S 24-70mm f/2.8G ED + Flash + Color Filter Set – 16GB Accessory Kit


$1,420.99


Canon EF 50mm f / 1.2L USM Lens with Case and Hood with 72mm Filter Sets Kit


Canon EF 50mm f / 1.2L USM Lens with Case and Hood with 72mm Filter Sets Kit


$1,349.00


Nikon 12-24mm F/4G ED-IF AF-S DX Zoom-Nikkor Lens with 77mm Filter Sets Kit


Nikon 12-24mm F/4G ED-IF AF-S DX Zoom-Nikkor Lens with 77mm Filter Sets Kit


$1,146.95


Sony Alpha E-mount Power Zoom 18-200mm F3.5-6.3 OSS with  67mm Filter Sets Kit


Sony Alpha E-mount Power Zoom 18-200mm F3.5-6.3 OSS with 67mm Filter Sets Kit


$1,129.00


Tamron 70-200mm G2  for Nikon + Flash + Color Filter Set - 64GB Accessory Kit


Tamron 70-200mm G2 for Nikon + Flash + Color Filter Set – 64GB Accessory Kit


$1,125.99


Tamron 70-200mm G2  for Nikon + Flash + Color Filter Set - 32GB Accessory Kit


Tamron 70-200mm G2 for Nikon + Flash + Color Filter Set – 32GB Accessory Kit


$1,121.99