SBIG Baader 1.25" UV / IR Blocking Filter
Item No. 757-60030
Manuf. No. SBIG BP UV+IR BLOCKER (51470)
The Baader UV / IR blocking filter is essentially a luminance filter. It is included with ST-2000XCM color cameras to improve the color balance of the single shot color CCD by blocking the near IR light. It is shown here along side the optional T-ring with filter threads for use on any ST cameras. It can be placed behind a camera lens adapter and used to block the out of focus near IR light that causes stars to look bloated with using a typical 35mm camera lens to shoot wide field images.