Baader Ultra-Narrowband 3.5nm H-alpha CCD-Filter 65x65mm square - 2459457 - 1

Baader Ultra-Narrowband 3.5nm H-alpha CCD-Filter 65x65mm Square - 2459457

Name: Baader Ultra-Narrowband 3.5nm H-alpha CCD-Filter 65x65mm Square - 2459457
Brand: Baader Planetarium
SKU: BDR_2459457
Price: 658 EUR
Availability: InStock

Reference BDR_2459457

€658.00

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Baader Ultra-Narrowband 3.5nm H-alpha CCD-Filter 65x65mm square

Baader All filters planoptically polished

Precision grade enforced H-alpha filter for f/10 to f/3.5 optical systems
Opens up the extremely narrow 3,5nm H-alpha world
This enforced contrast results in even fainter stars, providing more signal of faintest nebulae detail
Manufacturing such ultra-narrow filter does require extreme coating homogeneity and very high CWL precision, which these filters are designed for. CWL= Center-wavelength / FWHM= full width half maximum.

Note: In general this DeepSky Ultra-Narrowband H-alpha Filter is not suitable for solar observation. The Halfbandwidth of 3,5nm equals 35 Ångstroem, high-quality H-alpha solar filter from SolarSpectrum start at 0.8 Ångstroem. At favorable conditions experiments might still be possible, although at lesser quality.

Filter Application: Photographic
Filter Type: Narrowband*~H-alpha
Filter size: 65mm square

Founded in Germany in 1955, Baader Planetarium specializes in very high-quality astronomical accessories, including filters, eyepieces, mounts and mounting hardware. Their innovative designs offer unique solutions for visual observers and astrophotographers alike, with products recognized for optical excellence and meticulous craftsmanship.