OPTOLONG L-QUAD ENHANCE FILTER harmonic 51 mm (16510 microns)

51 mm (16510 microns)

the CDK14 is an exceptional diffraction-limited telescope

Counterweight shaft length 400 mm

the CDK17 is an exceptional diffraction-limited telescope

5" dovetail Connection side B M114 x 1 male SKU TE-SCA260-ESATTO3

OPTOLONG L-QUAD ENHANCE FILTER harmonic 51 mm (16510 microns)The new Optolong L Quad Enhance (L QEF) is a quad broadband astrophotography filter designed to drastically reduce the effect of light pollution under urban skies. Like the popular L Pro filter, the L QEF effectively blocks out the main sources of urban light pollution such as mercury and sodium streetlights while isolating deep sky objects. The L QEF's quad bandpasses are engineered to retain a natural colour balance of nebulae, galaxies and