Antlia 3nm OIII Pro Series Filter - 31 mm - OIII-PRO-3NM-31 StarField Newtonians In terms of mechanical design

In terms of mechanical design

The ED lenses ensure that each wavelength of light is kept in balance with all the others to provide an image which is true-to-life

Maksutov-Cassegrain telescopes are noted for their higher f/numbers for high contrast

Ball head adapter is included

Antlia 3nm OIII Pro Series Filter - 31 mm - OIII-PRO-3NM-31 StarField Newtonians In terms of mechanical designThis very narrowband 3 nm OIII filter from Antlia is part of their Pro series and is of the 31 mm unmounted variety. It is normally used in a 1. 25" 31mm filter wheel, where it drops into place. Antlia 3nm Pro Series Oxygen III Filter 31 mm The Antlia OIII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering