Askar C2 Sii/Oiii Filter [Sale Pending]
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This is an entry level duoband Sii/Oiii filter to complement an Ha/Oiii filter when shooting narrowband with an OSC camera.
For what it is, it performs very well for imaging nebulae and other emission sources. It has a generous bandpass on both the Sii and Oiii wavelengths to maximize signal to noise ratio and block out unwanted wavelengths of light.
It is in pristine condition, it lived in an EFW for the last 6 months that I have owned it. I have moved up to a more restrictive duo band filter and need the slot in the EFW.
Funding Member
