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2" f/3 (3.5nm) ultra-high-speed H-alpha filter: optimized for CMOS

Baader CMOS H-alpha f/3 2" x 2mm ultra high speed filter - premium grade - with 2" screw thread (M48)

3.5nm FWHM (to harmonize shutter speed with O-III/S-II), recommended for fast f/3.4 to f/2.3 optics

Especially for special filter requirements when using fast f/3 lenses

Enables the highest contrast even in the strongest light pollution, minimizes star size, makes the finest detail of the nebula accessible - indispensable under Bortle skies 9/8/7/(6)

Plano-optically polished, hard-coated Reflex-Blocker™ with sealed coating edges (Life-Coat™)

Blackened edges all around, with front filter indicator in the form of a black outer rim on the side of the telescope

Optimized for modern CMOS cameras, equally suitable for CCD camera technologies

Encased in a Baader Low Profile Filter Cell (LPFC): 6mm high

€314.88
Entrega entre 7 y 9 días laborables
Reference:
VK-2961353
Description

The new generation of Baader filters optimized for CMOS is characterized by:

Baader filters optimized for CMOS

higher contrast

full widths even narrower at half maximum (FWHM)

Reflex-Blocker™ coatings for the highest possible insensitivity to retroreflection from the nearest auxiliary optics, even in the harshest conditions

Carefully designed FWHM for each filter category to allow 1:1:1 exposures tuned to typical CMOS quantum efficiency and signal-to-noise ratio

Filter thickness identical to existing standards, with the greatest care regarding homofocality

Blackened edges all around, with front filter indicator in the form of a black outer edge at the front to further prevent any reflection of light falling on the edge of the filter.

Each filter is individually polished and optically fine coated, with a sealed coating edge (NOT cut from a larger plate, with the result that the coating edges are exposed, see more on this here)

Life-Coat™ – even harder coatings to allow an aging resistant coating for unlimited life, even in the harshest environments

Especificaciones:

MANUFACTURER Baader Planetarium
SKU (#) 2961353
EAN CODE 4047825047649
NET WEIGHT (KG) 0.07
SUITABLE FOR F/RATIO f/3.4 to f/2.3
TRANSMISSION RANGE H-alpha
FILTER THICKNESS (WITHOUT CELL) 2 mm
HBW (HALFBANDWIDTH) 3.5 nm
CWL (CENTRAL WAVELENGTH) 656,3 nm
AR-COATING Reflex-Blocker™ hard coated, planeoptically polished
SPECIAL FEATURES CMOS-optimiert mit Life-Coat™
FILTER SIZE 2 inch
FILTER USAGE CMOS, CCD, H-alpha
FILTER MOUNTED Mounted (LPFC 6mm)
TYPE OF FILTER f/3 Ultra-Highspeed
SINGLE OR SET? Single Filter
FILTER SHAPE round

Product Details
VK-2961353
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