ToupTek New narrowband 2inch filter Variant:SII filter 2inch 6.5nm Give you higher contrast and

Give you higher contrast and greater detailed viewing

If you have a camera with low dark current and effective cooling

Ergonomic 45-Degree Viewing Angle: Ensures comfortable

ZWO ASI 294MC PRO can run up to 25fps at 4k format base on USB3

ToupTek New narrowband 2inch filter Variant:SII filter 2inch 6.5nm Give you higher contrast andToupTek New narrowband 2inch filter Narrowband filters make astronomical photography more interesting. Emission nebulae contain rich and complex narrowband emission lines, such as the deep red 656. 28nm H emission line, the red [SII] (671. 6nm and 673. 1nm) and the blue green [OIII] (500. 7nm and 495. 9nm). Compared with broadband, narrowband filters only focus on a few very narrow bands, retaining only a few nanometers to a dozen nanometers of