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and perfect star shapes
SharpStar 1X ED Full-Frame Coma Corrector
Visual Back Adapter for 2"
holding it securely with a setscrew to a standard size 1
ZWO 2" SII 7nm Narrowband Filter - SII7NMD2 16.5 mm Eyepieces and perfect star shapesThe ZWO SII 7nm Narrowband Filter passes light at the 672nm wavelength with a bandpass of 7nm for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants. Use this SII (Sulfur II) with H alpha and Oxygen III narrowband filters (SHO Set) for tricolor CCD astrophotography. This rendition of the ZWO SII 7nm Filter is housed in a 2" threaded metal cell and can be used in 2" filter wheels
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