Dual-band Pass Filter Designed For DSLR CCD Control From Lights Polluted Skies For Sale
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Dual-band Pass Filter Designed For DSLR CCD Control From Lights Polluted Skies:
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OPTOLONG 2" L-eNhance Filter Dual-band Pass Filter Designed for DSLR CCD
The relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel.
L-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas.
Optolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.
L-eNhance Filter Spectrum Curve:
According to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized dual-band L-eNhance filter in order to retain the prominent color of nebula RGB while blocking out most of light pollution.
1. Substrate: B270
2. Thickness: 1.85mm
3. Tpeak: T>90%
4. Blocking range: 300-1000nm
5. Blocking depth: light pollution line blocking >99%
6. Surface quality: 60/40
7. Transmitted Wavefront RMS: λ/4
8. Parallelism (arcsec): 30s
l OPTOLONG 2"L-eNhance Filter
Sturdy Plastic Case
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