OPTOLONG 2″ L-eXtreme Filter Dual-band Pass Filter Designed for DSLR CCD Control from Light Polluted Skies Amateurs LD1016BOPTOLONG 2″ L-eXtreme Filter Dual-band Pass Filter Designed for DSLR CCD Control from Light Polluted Skies Amateurs LD1016BOPTOLONG 2″ L-eXtreme Filter Dual-band Pass Filter Designed for DSLR CCD Control from Light Polluted Skies Amateurs LD1016BOPTOLONG 2″ L-eXtreme Filter Dual-band Pass Filter Designed for DSLR CCD Control from Light Polluted Skies Amateurs LD1016B

OPTOLONG 2″ L-eXtreme Filter Dual-band Pass Filter Designed for DSLR CCD Control from Light Polluted Skies Amateurs LD1016B

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Product Description

OPTOLONG 2″ L-eXtreme Filter Dual-band Pass Filter Designed for DSLR CCD Control from Light Polluted Skies Amateurs

L-eXtreme Introduction:

  1. Advantage: The advantage of the L-eXtreme filter is that there is no transmission between the H-beta and OIII lines, as there is no nebula emission lines there. In this case, it isn't letting light pollution come through so that maximize nebulas signal and make the sky background darker while imaging. The L-eXtreme filter should better isolate the emission lines only and better protect from light pollution.
  2. Difference: Unlike the Optolong L-eNhance filter which is a tri-band (transmits Hb, Ha, and OIII), the L-eXtreme filter is dual band that passes Ha and OIII emission lines.
  3. Introduction: L-eXtreme is a two 7nm bandpass filter which can be used with one-shot color cameras like DSLR's (digital SLR), and monochrome CCD cameras, it is also more suited for fast systems. The convenience and cost effectiveness of this filter allows amateurs to image a rich emission nebulas, even in bright, light pollution skies. Optolong believes the design of LeXtreme filter would be better choice for fast systems in competitive price. It isolates the H-Alpha, and Oxygen III nebula emission lines so that the contrast and signal-to-noise ratio between nebulae were maximized. For people who are living in very light polluted areas, or when the moon is out, the L-eXtreme will be a good filter.
  4. Design: Hydrogen is the largest, the most primitive, the simplest, and the oldest element in the universe. Scientists consider that Hydrogen amounts to more than 90% of visible substance in space. Our sun is 5 billion years old, but so far hydrogen is still the key matter of nuclear fusion. While the sulfur element does not have much scientific significance, so keeping H and O is meaning for exploration of life.

L-eXtreme Spectrum: According to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized two 7nm narrowband filter in order to retain the prominent color of nebula RGB while blocking out the light pollution. Spectrum shown as below:

  1. Sbustrate: B270
  2. Thickness: 1.85mm
  3. FWHM: O3 7nm+Ha 7nm
  4. Blocking range: 300-1000nm
  5. Blcoking depth: light pollution lines blocked>99.9%
  6. Surface quality: 60/40
  7. Transmitted
  8. Wavefront RMS: λ/4
  9. Parallelism: 30''
  10. Size: 2inch

Package Includes:

  • OPTOLONG 2″ L-eXtreme Filter
  • Sturdy Plastic Case

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Item Specifics

Brand Name: 
 Optolong
Type: 
 Monocular
Model Number: 
 OPTOLONG 2" L-eXtreme Filter
Type: 
 OPTOLONG 2" L-eXtreme Filter
OPTOLONG L-eXtreme Astronomy Filter: 
 for telescope
OPTOLONG filter 2" L-eXtreme: 
 for Binoculars monocular
OPTOLONG 2" L-eXtreme Filter: 
 for CCD Digital Astrophotography
Astronomy telescope: 
 Telescope Filter
Best Price: 
 High Quality
2" L-eXtreme Filter for telescope: 
 optolong filter
for Astrophotography: 
 Filter Astronomical
OPTOLONG L-eXtreme Filter: 
 for Astronomy Telescope Eyepiece
Monocular telescope: 
 Astrophotography
OPTOLONG Colored light filter: 
 for Telescope telescopio
Astronomical monocular: 
 Telescopes Dual-band Pass Filter
OPTOLONG L-eXtreme Filter wholesale: 
 for Astronomy Telescope
Dual-band Pass Filter: 
 for DSLR CCD

SHIPPING AND DELIVERY

We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-20 Business days
Canada, Europe 10-20 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.

REFUNDS & RETURNS POLICY

Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.

Refunds

Your satisfaction is our #1 priority. Therefore, if you’d like a refund you can request one no matter the reason.

If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.

If you received the wrong item you can request a refund or a reshipment.

If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of wowbeli (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of wowbeli.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.

Exchanges

If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

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