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Hi,
Could anyone help? I need to know infomomation about different telescope filters that are used for deep sky and planetary observations I need to get hold of information, which tells me what they are used for and what images taken through the filters tell us. THe filters i need info on a Sloan U', I' and R' Bessel B and V OIII H-Alpha Infra-red bands j, h, k, l Any help would be appreciated -- Jon |
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