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

you can charge it on time

If you do a 30-sec exposure without any filters from a light-polluted urban observing site

Full-Width-Half Maximum (FWHM): 12nm

A bag of filter masks for 50mm filters (7pcs/ bag)

256MB DDR3 image buffer

Full Well Capacity: 15000e

you can listen to it just press the Favorite button

orange color means the receiver is in charging state

so it is easy to find the Polaris

The Astronomik CLS CCD filter is designed for astrophotography from locations affected by artificial light pollution

Note: Bluetooth version: 5

Vixen-style dovetail compatibility for easy attachment to most common mounts and saddles