Bandmate filters yield bright, sharp and well contrasted images — even in the optically sensitive position in front of the diagonal. Optical glass and red filtering allows for sharp and bright views of nebulae with embedded star clusters — such as the Lagoon Nebula (M8)

Bandmate NebuStar Filter

High-performance, dielectric, squarewave "UHC" type general purpose narrow-band filter great for all nebulae types and instrument sizes.

• Red blocking allows brighter, sharper star images not plagued with red fringing seen on most filters of this type.
• Highest transmission in critical bands
• Optical quality ground and polished BK-7 substrate means no loss of sharpness - even when used in front of mirror diagonals.

Bandmate OIII Filter

This OIII filter particularly enhances planetary nebulae in larger telescopes.

• Narrowband filter for high transmission, with high blocking of unwanted longer wavelengths to yield high-contrast images.
• Ion beam technology and optical glass produces low scatter in a hard stable coating to reduce changes due to temperature and humidity.
• Optical quality ground and polished BK7 glass yields sharp star images even when filter s placed in front of diagonal.

Tele Vue ensure 100% quality control

Every single filter is checked optically and cosmetically to assure performance. Every filter is individually serialized.

Tele Vue Bandmate Mars
Visual Filters

Tele Vue offers two contrast enhancing filters specifically designed for viewing Mars, but also quite useful on Jupiter.

Why two filters? Traditionally, standard coloured filters have been used to bring out detail on the planet’s surface. The main drawback is the artificial colour imposed on all planetary features.

Bandmate Mars Type-A Filters
We all know you can’t have your cake and eat it too, but the Bandmate Mars Type-A filter lets you at least have a good taste! The Type-A is a dual band filter with different dielectric coatings on each side of the substrate. The dual band nature of the filter permits green and red through while rejecting all other visible colours. The effect is to enhance detail on the Martian surface while preserving the natural colour of the polar caps and rest of the surface. Since this filter provides a most natural view, it is highly recommended for public viewing.

Bandmate Mars Type-B Filters
The Bandmate Mars Type-B filter is a high efficiency, single band dielectric coating that achieves penetrating views of the Martian surface. The surface appearance is similar to that of the popular #21 filter. However, the Type-B features a broadband anti-reflection coating on one side and filter coating on the other that makes it far more efficient

Features of Tele Vue Bandmate Filters

Optical grade BK7 glass to insure no image degradation due to the substrate. Ion beam deposition of the coatings produces hard, stable coatings to reduce changes due to temperature and humidity. Dielectric filter for high transmission and blocking of unwanted wavelengths provide high contrast images. Aluminium filter cells precision machined and laser etched.

All Tele Vue products are available in the UK from Venturescope where you can enquire about Tele Vue Filters