OPTOLONG SHO(6.5nm) Set (50,8mm)

These filters are intended for CCD applications.

Filter Specification:

• H-Alpha: CW 656nm, 12 or 7nm bandwidth 
• O-III: CW: 500nm, 12 or 7nm bandwidth 
• S-II: CW: 672nm, 12 or 7nm bandwidth 

These filters are not suitable for solar observations!

Technical specifications

• Supporting glass of Schott
• Surface Quality 60/40 (corresponding to the EE kindness by American military standard MIL-O-13830)
• Fine optically polished, 1/4 wavefront
• min. 90% peak transmittance in the passband
• IR Blocking 700-1100nm off band

Coating properties:

High Homogeneous multilayer anti-reflection coating
The allowances are not cemented to the optical carrier, but applied Deposition (IBAD) method by electron beam evaporation and subsequent ion beam assisted.
This special process allows a high durability and scratch resistance, and high stability of the center wavelength (CWL) and prevents a temperature drift.
High transmission in the passband, high optical density in the stop band.

Filter version:

• Ultrathin filter mount for maximum passage: 26mm at the 1.25 "filters, 45mm at the 2" filters
• Precise CNC manufacturing
• Sandblasted
• Black anodized
• blackened to reflections
• Laser engraving - no fading of the label

These filters are intended for CCD applications.

Filter Specification:

• H-Alpha: CW 656nm, 12 or 7nm bandwidth 
• O-III: CW: 500nm, 12 or 7nm bandwidth 
• S-II: CW: 672nm, 12 or 7nm bandwidth 

These filters are not suitable for solar observations!

Technical specifications

• Supporting glass of Schott
• Surface Quality 60/40 (corresponding to the EE kindness by American military standard MIL-O-13830)
• Fine optically polished, 1/4 wavefront
• min. 90% peak transmittance in the passband
• IR Blocking 700-1100nm off band

Coating properties:

High Homogeneous multilayer anti-reflection coating
The allowances are not cemented to the optical carrier, but applied Deposition (IBAD) method by electron beam evaporation and subsequent ion beam assisted.
This special process allows a high durability and scratch resistance, and high stability of the center wavelength (CWL) and prevents a temperature drift.
High transmission in the passband, high optical density in the stop band.

Filter version:

• Ultrathin filter mount for maximum passage: 26mm at the 1.25 "filters, 45mm at the 2" filters
• Precise CNC manufacturing
• Sandblasted
• Black anodized
• blackened to reflections
• Laser engraving - no fading of the label