Robtics Baader Ultra-Narrowband 3.5nm H-alpha CCD-Filter 1¼" - 2459451

Baader Ultra-Narrowband 3.5nm H-alpha CCD-Filter 1¼" - 2459451

Name: Baader Ultra-Narrowband 3.5nm H-alpha CCD-Filter 1¼" - 2459451
Brand: Baader Planetarium
SKU: BDR_2459451
Price: 257 EUR
Availability: InStock

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257,00 €

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Baader Ultra-Narrowband 3.5nm H-alpha CCD-Filter 1¼", LPFC-mounted

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.

Application de filtre: Photographique
Type de filtre: Narrowband*~H-alpha
Filter size: 1¼ inch (31,75mm)

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.