• Chroma Technology Classic UBVRI Photometric Johnson/Cousins Bessell filters are designed for photometry purposes.
• Unlike narrowband, Bessell filter are wide band filters that permit and reject very wide bandpasses.
• The UBVRI filter set encompasses Ultraviolet, Blue, Visible, Red, and Infrared bands.
• These filters are used for analyzing star distance, temperature, composition, and analysis of galaxy or nebulae composition, among other purposes.
• The Infrared filter, also known as the "I Passband," permits a bandpass range of approximately 700-1100 nm with a bandpass width of around 400 nm.
• This filter is the 50mm unmounted configuration of the Chroma Classic I Bessell filter.

The Chroma Technology Classic UBVRI Photometric Johnson/Cousins Bessell filters are designed specifically for photometry purposes. They can be thought of as somewhat the reverse of narrowband filters which only allow a very specific bandpass. In the case of these filters, they are wide band filters that permit and reject very wide bandpasses. The UBVRI, or often known as Bessell or Johnson/Cousins is a popular photometric filter set that encompasses Ultraviolet, Blue, Visible, Red and Infrared bands. These filters can be used for a variety of purposes such as analyzing star distance, temperature, composition and analysis of galaxy or nebulae composition and much more.

The fifth filter in the UBVRI set is the Infrared filter, which permits a bandpass range from approximately 700 - 1100 nm with a bandpass width of around 400 nm. This is often referred to as the "I Passband".