Optolong H-beta Filters 25nm

Optolong H-beta Filters 25nmThis premium Optolong Narrowband H beta filter is designed for nebula observation allowing 25nm bandwidth of light centered on a wavelength of appr 490nm throughout, about halfway between the H beta emission line and OIII. It also reduces the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by

For the three most important emission lines of oxygen (OIII)

this filter is ideal for use with colour astronomy cameras

Even small alignment errors can lead to elongated stars

Customizable Design

nebulae and clusters become brighter

Choosing the Right Filter:

Excellent results with Ha + O III Bi-Color combinations

These systems can be sized to meet your current tour guide requirements and then be expanded as your tour program grows

Astronomik OIII 12nm CCD MaxFR 1

When you listen to the radio

12V power cable with cigarette plug for EAGLE - 250cm

Retekess T119 pager system set consists of one 999-channel call button keypad and 10pcs wireless pagers