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Optolong L-eXtreme Light Pollution Dual-Bandpass Narrowband Imaging Filter

£161.00
£169.00
(Inc. 20% VAT)
Loyalty Points: 161
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Product Code
OPT-L-eXtr-1.25
Brand
Email us a question about this ProductOptolong
Description

Optolong L-eXtreme Light Pollution Dual-Bandpass Narrowband Imaging Filter

The Optolong L-eXtreme filter is a dual-bandpass narrowband filter designed for light polluted skies to maximise the output from your imaging time. It offers even higher contrast than the popular L-eNhance filter due to the narrower bandwidths at both parts of the spectrum, H-alpha and OIII.

Optolong came out with their latest development that offers a more extreme dual-narrowband solution in comparison to their very popular L-eNhance filter. Both the L-eNhance and L-eXtreme are Dual-bandpass filters as they let through the light in two sections (bands), however, to distinguish between the L-eNhance and the latest L-eXtreme filters, we had to rename the L-eNhance to a triple-band filter. Both filters have two bands, but the L-eNhance lets through the light coming from three important emission light sources (H-Alpha, H-Beta, and Oxygen III), whilst the L-eXtreme focuses on two important emission light sources only (H-Alpha and Oxygen III), hence the change of title for the L-eNhance filter.

In the L-eXtreme you have two very narrow bands at 7nm each. The bandwidth of the H-alpha  part is similar in both filters (although it is somewhat narrower in the L-eXtreme), but in the L-eXtreme now we have an extremely narrow band at 7nm for the OIII as well. 

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-eXtreme, similarly to the popular 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), colour CMOS and colour 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-exTreme filter is a technical innovation among filters. It effectively isolates the H-Alpha and Oxygen III nebula emission lines whilst blocking out 99.9% of light pollution and achieves a maximum transmission of over 93%. As a result, contrast and signal-to-noise ratio from the nebulosity is maximised. The performance of this filter delivers images that superbly control the impact from light polluted skies.

L-eXtreme 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 the dual-band L-eXtreme filter in order to retain the prominent color of nebula RGB while blocking out nearly all of the light pollution. Spectrum as shown below:

Specifications

Specifications: Optolong L-eXtreme Light Pollution Dual-Bandpass Narrowband Imaging Filter

  • Substrate: B270 (high quality optical glass)
  • Thickness: 1.85mm
  • Tpeak: T>92-93%
  • Blocking range: 300-1000nm
  • Blocking depth: light pollution  line blocking >99.9%
  • Surface quality: 60/40
  • Transmitted Wavefront RMS: λ/4
  • Parallelism (arcsec): 30"

What's in the Box

What's in the Box: Optolong L-eXtreme Light Pollution Dual-Bandpass Narrowband Imaging Filter

  • Optolong L-eXtreme Light Pollution Dual-Bandpass Narrowband Imaging Filter
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Delivery

At The Widescreen Centre, we prioritize prompt order processing and dispatch. We strive to dispatch all orders on the same day or the next working day, depending on the time of your order. We hold extensive stocks to ensure that your items are ready for immediate despatch. Please note that the cut-off time for same-day dispatch is usually 1:30 p.m.

For delivery within Mainland UK, we use reputable couriers to provide efficient service. You can expect your package to arrive in 1-2 working days. Please note that a signature may be required upon delivery to ensure a secure receipt.

In the case of special order items, the delivery time may be longer. If you have any concerns or questions about the delivery of your item, please don't hesitate to Contact Us. We are here to assist you.

Should there be any delay in dispatching your order, we will notify you to keep you informed.

Please be aware that The Widescreen Centre cannot be held responsible for any postal or third-party delays that may occur. We are committed to providing a reliable and efficient delivery service for our valued customers.

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