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Baader 3.5 / 4nm f/2 50.4mm Ultra High Speed Filter Set - Optimized for CMOS (H-alpha / O-III / S-II)

Baader CMOS H-alpha / O-III / S-II f/2 50.4mm x 3mm Ultra High Speed ​​Filter Set - Premium Grade

3.5/4nm FWHM (to harmonize the exposure time of H-alpha with O-III/S-II), recommended for extremely fast optical systems greater than f/2.3

Specially designed for special filter requirements when used with extremely high aperture f/2 optics such as Celestron's RASA astrographs.

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

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€1,169.42
Reservation On request, out of stock.
Reference:
VK-2961684
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 (#) 2961684
EAN CODE 4047825104144
NET WEIGHT (KG) 0.21
SUITABLE FOR F/RATIO < f/2.3
TRANSMISSION RANGE H-alpha / O-III / S-II
FILTER THICKNESS (WITHOUT CELL) 3 mm
HBW (HALFBANDWIDTH) 3.5 nm (H-alpha) / 4 nm (O-III / S-II)
CWL (CENTRAL WAVELENGTH) 656,3 nm / 500,7 nm / 671,7 nm
AR-COATING Reflex-Blocker™ hard coated, planeoptically polished
SPECIAL FEATURES CMOS-optimized with Life-Coat™
FILTER SIZE 50.4 mm
FILTER USAGE CMOS, CCD, H-alpha, O-III, S-II
FILTER MOUNTED Unmounted
TYPE OF FILTER f/2 Ultra-Highspeed
SINGLE OR SET? Filter-Set
FILTER SHAPE round
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Product Details
VK-2961684
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