ALTAIR ASTRO PREMIUM F125CLSCCD UVIR blocking filter with AR coating

NOTICE: Do not use for the Sun.

The Altair Astro Premium 1.25" CLS-CCD filter is designed for image capture with DSLR, CCD or CMOS cameras, although it can be used for visual observation with 6-8" aperture or larger telescopes.

This 1.25" filter has a clear 26mm aperture to minimize vignetting.

The Altair Astro CLS-CCD filter dramatically reduces the effects of light pollution and natural glare from the moon or sky, allowing for long exposure imaging, even in urban conditions.

It enhances nebulae with 95% maximum transmission at wavelengths H 486.1 nm; OIII 495.9 nm; OIII 500.7 nm and H 656.3 nm.

Artificial Light Pollution wavelengths are very effectively blocked, the main ones being:

• Hg 435.8
• Hg 546.1nm
• Hg 577.0nm
• Hg 578.1nm
• Na 589.0
• Na 589.6nm
• Na 615.4nm
• Na 616.1nm

In addition to the high quality German Schott glass and premium coatings, these filters have some additional enhancements that make them ideal for your astroimaging application.

Advanced UV/IR blocking provides small star sizes even with refracting optics, and AR (anti-reflection) coatings reduce halo effects and internal reflections for more pleasing star images.

Can be used visually in 250mm or larger aperture telescopes for very high contrast (Do not use for the Sun!)

Technical Specifications:

• Multi-layer anti-reflection coating to reduce star halos and reflections from the camera optical window.
• Batch tested to ensure uniformity.
• Ultra-thin glass from Schott Germany. 1.85mm 30sec parallel glass, optically polished to MIL Spec. MIL-O-13830.
• High quality dichroic/dielectric coatings. Electron beam gun evaporation with ion-assisted deposition coating technology for durability and scratch resistance as well as CWL (center wavelength) stability. No drift affected by temperature change.
• UV/IR block for imaging - reduction of stellar swelling with refractors.
• Weight: 0.5 kg
• Precision CNC machined filter cell for stress and tilt free mounting.