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36mm (4nm) S-II Ultra Narrow Band Filter - Optimized for CMOS

36mm x 2mm Ultra Narrowband (Narrowband) CMOS S-II Baader Filter - Premium Grade

4nm FWHM, recommended for optical systems slower than f/3.4

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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€263.64
Entrega entre 7 y 9 días laborables
Reference:
VK-2961477
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 (#) 2961477
EAN CODE 4047825047984
NET WEIGHT (KG) 0.06
SUITABLE FOR F/RATIO > f/3.4
TRANSMISSION RANGE S-II
FILTER THICKNESS (WITHOUT CELL) 2 mm
HBW (HALFBANDWIDTH) 4 nm
CWL (CENTRAL WAVELENGTH) 671,7 nm
AR-COATING Reflex-Blocker™ hard coated, planeoptically polished
SPECIAL FEATURES CMOS-optimized with Life-Coat™
FILTER SIZE 36 mm
FILTER USAGE CMOS, CCD, S-II
FILTER MOUNTED Unmounted
TYPE OF FILTER Ultra-Narrowband
SINGLE OR SET? Single Filter
FILTER SHAPE round
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Product Details
VK-2961477
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