Astronomy Specialist

BAADER CMOS SHO F/3 HIGHSPEED FILTER SET

Regular price $1,169.00AUD
SKU: BA2961640

Baader Planetarium

Size

 

The new Baader CMOS-optimized SHO 3.5 / 4nm Highspeed F/3 filters are precision-grade narrowband filters with high transmission at their respective emission lines. The Highspeed versions are specifically designed to work very well with modern highly-sensitive astronomy cameras and telescopes with extremely fast focal ratios between f/3.4 and f/2.3 such as the Sharpstar Hyperbolic Newtonian astrographs. The ultra-narrow 3.5 - 4nm bandpass make these ideal for imaging under light-polluted skies.

Baader's CMOS-optimized filters have excellent halo and reflection control. These filters set the new standard for monochrome astrophotography with CMOS sensors.

 

 

Baader CMOS-optimized filters - advantages

  • Very high contrast due to steep edges of the coating
  • Reflex-Blocker coatings to minimize reflections caused by correctors, reducers and other optical elements
  • Standardized thickness for maximum possible parfocality - less need to refocus due to different filter thicknesses
  • Blackened edges with side markings in the form of a black outer rim on the telescope side
  • Each filter is individually fine-polished and coated with sealed coating edge, preventing moisture ingress
  • Life-Coat for hardness and age-resistance, making the filters able to withstand tougher conditions for longer

 

Warning: Imaging H-alpha filters are different from solar H-alpha filters and cannot be used for this purpose. Doing so may cause damage to your equipment and eyesight!

 

For more information on Baader's new generation of CMOS-optimized filters, check out this blog post

Specifications

 

Transmission range
H-alpha, O-III, S-II
Central wavelength
H-a - 656.3 nm, O-III - 500.7 nm, S-II - 671.7 nm
Half bandwidth H-a - 3.5 nm, O-III & S-II - 4 nm
Suitable for f/ratio f/3.4 to f/2.3
AR-coating
Reflex-Blocker hard coated, planeoptically polished
Filter thickness 1.25", 2", 31 mm, 36 mm 2 mm (without cell), 6 mm with cell
Filter thickness 50.4 mm, 50 x 50 mm, 65 x 65 mm 3 mm
Filter size 1.25", 31 mm, 36 mm, 2", 50.4 mm round, 50 x 50 mm square, 65 x 65 mm square
SKU 1.25" BA2961640
SKU 31 mm BA2961641
SKU 36 mm BA2961642
SKU 2" BA2961643
SKU 50.4 mm round BA2961644
SKU 50 x 50 mm BA2961645
SKU 65 x 65 mm BA2961646