Baader L-RGB CCD-Filterset 50.4 mm

Beschrijving

Baader L-RGB CCD-Filterset 50.4 mm

Mechanical Properties

• Parfocal and plane polished substrates. Each individual filter is optically fine-polished to 1/4 wave.
• Baader L-RGB filters are hard coated individually.
• Baader filters especially are not cut out of large size plate-glass, which is a typical manufacturing process for economy filters (cut-out filters exhibit micro-cracks around all edges. Capillary action between glass and coating layers will lead to premature ageing due to moisture deposition).
• All Baader filters have individual coating sealed edges, impermeable against ageing because the the penetration of moisture impossible.
• Baader filters are being tested repeatedly to comply with MIL-specifications. One common process is to boil the test specimen for one hour in salt water. Baader filters remained completely intact as opposed to filters drilled out of large glass plates.
• All Baader filters sport scratch resistant hard coatings which can be cleaned repeatedly throughout their entire lifetime. As many times as needed – preferably with Baader Optical Wonder cleaning fluid.

Optische eigenschappen van de Baader L-RGB CCD-Filterset 50.4 mm zijn:

• No reflections when compared to competing RGB-filter recipes.
• Balanced RGB-design offer 1:1:1 exposure times for most telescope optical systems – an important benefit when imaging in automated mode.
• Maximized colour contrast for each of the three RGB channels – achieved through steep slopes at all transmission curves combined with science approved placement of spectral window.
• O III emission line double-weighted in the B and G channel as well, with maximum peak transmission for unparalleled deep sky S/N yield
• R-Filter provides maximum transmission of H-alpha and S II emission but at the same time completely blocks all NIR and IR from 680 out to 1200 nm
• Blocking of Mercury and Sodium vapour lamps at 580 nm in the G and R filters blackens the sky background and maximizes colour balance and colour separation.