- Lower Price - STC Astro Duo-Narrowband Filter
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Excellent, near mint condition. Price is firm. Filter is normally $280. I'm selling because I need to upgrade to 2". All original packaging. This filter allows for some pretty amazing images. My area is not heavily light polluted but the details are so much more visible. Contrast is greatly enhanced. I am going to add a sample image taken with my 294MC pro using this filter.
From Cyclopsoptics website:
From Cyclopsoptics website:
- "Passes two major narrowband 10nm transmission lines — Ha (656.3nm) & O-III (500.7nm) at high transmission rate (~80% or above)
- Suitable for DSLR and One-Shot-Colour Camera
- Superb contrast for nebulosity"
"STC utilises ion beam assisted deposition (IBAD) to solidly bind the coatings onto Schott B270 glass, the very same glass used in Zeiss lenses. Such technique enhances the light transmission and also durability of the 160 layers of coating deposited to produce the advanced filter characteristics shown above.
With patented Ultra Layer® technology, both surfaces of Astro-Multispectra are coated with Anti-Smudge nano-coating to prevent dust and water from settling on the filter surface. Dew will not form and your filter is aways clean. If necessary, it's effortless to clean."
Funding Member
