Optolong 1.25" / 2" L-eNhance Dual Narrowband Filter for DSLR CCD Control from Light Polluted Skies

Optolong 1.25" / 2" L-eNhance Dual Narrowband Filter for DSLR CCD Control from Light Polluted Skies

Description:
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.

Spectrum and Characteristics:
- Substrate: B270
- Thickness: 1.85mm
- Tpeak: T>90%
- Blocking range: 300-1000nm
- Blocking depth: light pollution line blocking >99.9%
- Surface quality: 60/40
- Transmitted Wavefront RMS: λ/4
- Parallelism: 30s

Package Included:
- 1 x Filter
- 1 x Plastic Box