Optolong L-Ultimate Filter for Deep Sky Imaging dual-band 3nm narrowband - 2" ES 52 deg series Item Number EPWP6820–01 Focal Length

Item Number EPWP6820–01 Focal Length 20mm Length 69

Width: 43mm

but the background sky will be very dark as the contrast effect increases with added magnification

Inspire Your Curiosity: The First Light 127mm Mak-Cassegrain Telescope invites you to nurture your astronomical curiosity

Optolong L-Ultimate Filter for Deep Sky Imaging dual-band 3nm narrowband - 2" ES 52 deg series Item Number EPWP6820–01 Focal Length1. L Ultimate Introduction The latest from Optolong's range of Dual Band Narrowband filters is the Optolong L Ultimate. It is designed to offer 2 extremely narrow 3nm passing bands with the goal of allowing only H Aplha and OIII through. These 2 wavelengths respectively Red and Green allow for one shot colour imaging in light polluted conditions like never before. By only allowing these 2 tiny wavelength through, it blocks light pollution, makes the