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Optolong L-eNhance Dual-Bandpass Narrowband Filter

Optolong L-eNhance Dual-Bandpass Narrowband Filter
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Price:  £129.00
List Price:  £144.00
(Inc. 20% VAT)
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Product Code:  OPT-L-eNh-1.25
Manufacturer:  Optolong

Optolong


The Optolong L-eNhance 2" filter is a dual-bandpass narrowband filter designed for light polluted skies to maximise the output from your imaging time.

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 as shown below:

Substrate: B270
Thickness: 1.85mm
Tpeak: T>90%
Blocking range: 300-1000nm
Blocking depth: light pollution  line blocking >99%
Surface quality: 60/40
Transmitted Wavefront RMS: λ/4
Parallelism (arcsec): 30s

Available Sizes

1.25” mounted and 2” mounted are available now.
Other sizes will be listed when become available.

 

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