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Plug in the power cord
Maintains the native focal length of the telescope while correcting field curvature for edge-to-edge star sharpness
Though the second window for the H-alpha line is not intended for visual observing
Diagonal size: 2″
Long-exposure astrophotography requires accurate tracking
ZWO Duo-Band Dual-Bandpass Narrowband Imaging Filter - 1.25" Colour Planetary Camera Plug in the power cordThe ZWO Duo Band Filter is a dual narrowband imaging filter designed for one shot colour (OSC) astronomy cameras. By isolating the important H alpha (656. 3nm) and OIII (500nm) emission lines, it enhances contrast in nebulae while reducing the effects of moonlight and urban light pollution. Ideal for deep sky astrophotography, the Duo Band filter allows colour camera users to capture narrowband style images without the need for a monochrome camera,
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