3.5 / 4nm  f/2 Ultra-Highspeed-Filter-Set 2

3.5 / 4nm f/2 Ultra-Highspeed-Filter-Set 2" – CMOS-optimized (H-alpha / O-III / S-II)

3.5 / 4nm f/2 Ultra-Highspeed-Filter-Set 2" – CMOS-optimized (H-alpha / O-III / S-II)

BAADER PLANETARIUM

2" x 2 mm Baader CMOS H-alpha / O-III / S-II f/2 Ultra-Highspeed Filter Set. Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

1.233,00 €

Διαθέσιμο κατόπιν παραγγελίας

Διαθέσιμο κατόπιν παραγγελίας
Στην περίπτωση αυτή περιλαμβάνονται προϊόντα που δεν κρατάμε σε στοκ αλλά διατίθενται μόνο κατόπιν παραγγελίας ή έχει προαναγγελθεί η κυκλοφορία τους στην αγορά από τον κατασκευαστή. Τα είδη αυτά αποστέλλονται συνήθως σε 5-14 μέρες. Μόλις λάβουμε την παραγγελία σας, θα σας ειδοποιήσουμε με e-mail ή τηλεφωνικά, για τον ακριβή χρόνο παράδοσης, καθώς και για το ύψος της τυχόν προκαταβολής που θα απαιτηθεί.
Διαθεσιμότητα: Σε απόθεμα
SKU
BA-2961683


3.5 / 4nm f/2 Ultra-Highspeed-Filter-Set 2" – CMOS-optimized (H-alpha / O-III / S-II)

  • 2" x 2 mm Baader CMOS H-alpha / O-III / S-II f/2 Ultra-Highspeed Filter Set – Premium Grade – with 2" (M48) filter thread
  • 3.5 / 4 nm FWHM (to harmonize the exposure time from H-alpha with O-III / S-II), recommended for extremely fast optical systems from < f/2.3
  • Specially designed for the special filter requirements when used with extremely fast f/2 optics like the Celestron RASA astrographs
  • For highest contrast even at strongest light pollution, minimizes star size, emphasizes finest nebula detail – indispensable under Bortle 9/8/7/(6) skies
  • Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
  • Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
  • Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies
  • Mounted in Baader Ultra Low Profile (ULP) filter cell – 5,5 mm height


This new generation of Baader CMOS-filters features:

  • Increased contrast
  • Ever more narrow passbands
  • Reflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
  • FWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s/n ratio
  • Identical filter thickness to existing standards, with utmost care for parfocality
  • Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter
  • Each filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)
  • Life-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment

OPTICAL SPECIFICATIONS

  • AR-Coating: Reflex-Blocker™ hard coatedplaneoptically polished
  • CWL (Central Wavelength): 656,3 nm / 500,7 nm / 671,7 nm
  • HBW (Halfbandwidth): 3.5 nm (H-alpha) / 4 nm (O-III / S-II)
  • Suitable for f/ratio: < f/2.3
  • Transmission Range: H-alpha / O-III / S-II
  • Type of Filter: f/2 Ultra-Highspeed


MECHANICAL SPECIFICATIONS

  • Filter mounted: Mounted (LPFC 6mm)
  • Filter shape: round
  • Filter size: 2 inch
  • Filter Thickness (without cell): 2 mm


USAGE & FEATURES

  • Filter Usage: CMOSCCDH-alphaO-IIIS-II
  • Single or Set?: Filter-Set
  • Special Features: CMOS-optimized with Life-Coat™
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