{"id":2467,"date":"2018-10-28T15:31:37","date_gmt":"2018-10-28T13:31:37","guid":{"rendered":"https:\/\/www.planetary-astronomy-and-imaging.com\/?p=2467"},"modified":"2018-10-28T17:04:53","modified_gmt":"2018-10-28T15:04:53","slug":"which-ir-filter-to-image-planets","status":"publish","type":"post","link":"https:\/\/www.planetary-astronomy-and-imaging.com\/en\/which-ir-filter-to-image-planets\/","title":{"rendered":"Which IR filter is best to image planets?"},"content":{"rendered":"

There are many IR-pass filters on the market. Here is a short guide to help you pick one… or several of them!<\/strong><\/em><\/p>\n

The IR filter is, in astronomy, a filter that blocks visible wavelengths and passes only the near infrared, a band of “color” that starts from around 700 nanometers and ends around 1000 nm (1 micron) where the sensitivity of your camera comes to an end. While others are available on the market, here are the ones I have, that cover every possible use (for relevance I’m including red filters that transmit infrared, so-called “R+IR”):<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n
R+IR <\/span><\/b><\/td>\nWavelength range<\/span><\/strong><\/td>\n<\/tr>\n
Baader RG610<\/span><\/td>\n610-1000 <\/span><\/td>\n<\/tr>\n
Astronomik BP642<\/span><\/td>\n642-842 <\/span><\/td>\n<\/tr>\n
IR<\/span><\/b><\/td>\n\u00a0<\/span><\/td>\n<\/tr>\n
Baader IR685<\/span><\/td>\n685-1000<\/span><\/td>\n<\/tr>\n
Astronomik IR742<\/span><\/td>\n742-1000<\/span><\/td>\n<\/tr>\n
Astronomik IR807<\/span><\/td>\n807-1000<\/span><\/td>\n<\/tr>\n
RG1000<\/span><\/td>\n1000<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

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What you must know about the near IR for planetary imaging:<\/span><\/strong><\/em><\/h3>\n