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            OPTOLONG 2" L-Pro Filter Suitable for visual observation and astrophotography Best Choice for Light Pollution Suppression

            Product Description

            Description

            The L-Pro (L-Professional) filter is designed to improve
            the visibility of various deepsky objects. By selectively reducing the
            transmission of wavelengths of light pollutants, specifically those
            produced by artificial lightings including mercury vapor lamps, both
            high & low pressure sodium vapor lights and the unwanted natural
            light caused by neutral oxygen emission in our atmosphere (i.e.
            skyglow). Together with the highly transparent in main nebula emission
            lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm),
            H-alpha(656nm) as well as SII(672nm), the filter is suitable for
            enhancing the contrast and details for both visual and photographic
            purpose at sub-rural area with heavy light pollution.

            Main Use and Performance:

            • Ultra-thin filter cell minimize vignetting by maximize possible clear aperture
            • Aerometal Material | Precise CNC Machining | Sand
              Blasting Process | Black Anodized Finish | Extinction Treatment to
              Prevent Reflection | Laser Engraving No Fading
            • Multi-layers anti-reflection coating
            • Non-cementing optical substrate coating
            • Electron-beam gun evaporation with Ion-assisted
              deposition coating technology for durability and resistance to
              scratching, as well as stability on CWL (central wavelength) no
              deviation affected by temperature change.
            • Planetary rotation system offers precision and
              homogeneity of coatings ensuring high value on transmission of pass-band
              and Optical density of off-band.

            Technical Data:

            • Schott substrate material
            • Thickness 2.0 mm
            • Surface Quality: 60/40 (Refer to MIL-O-13830)
            • Fine-optically polished to ensure accurate 1/4 wavefront and < 30 seconds parallelism over the both surfaces
            • High transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm&500nm, SII 672nm and H-beta 486nm).
            • Precision off-band blocking, specifically the major
              emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm
              and 578nm)

            Package Includes

            • OPTOLONG 2" L-Pro Filter
            • Sturdy Plastic Case

             

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            Payment

            We accept payment via PAYPAL.Please make sure Ebay address is correct.
            All major credit cards are accepted through our secure payment processor PayPal.
            Payment must be received within 7 business days of auction closing.

            Delivery details

            Processing time:as the item description.

            We will prepare the shipment in 48-72 hours(Sundays and holidays excepted. )after we receive the payment and after the eCheck is cleared.
            Please make sure the Ship-To address you type during checkout is correct. We are not responsible for any wrong or undeliverable addresses.
            We strive our best to provide you the most reliable, affordable way of shipping service. But sometimes international delivery is highly depended on the Courier Company and local customs/duties. If you do not receive your item on time, please contact us immediately for further assistance. Thank you for your understanding.

            Custom fee (including VAT&GST):

            Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. Please check with your country's customs office before bidding. We will try our best to help customer do customs clearance.

            A:Overseas Warehouse Local Dispatch

            From US Local Dispatch: USA: 2-6 business days , other countries: 5-14 business days.

            From UK Local Dispatch: UK: 1-5 business days , other countries: 3-8 business days.

            From DE Local Dispatch: Deutschland: 1-3 business days , other countries: 2-5 business days.

            From AU Local Dispatch: AU:2-6 business days.  B: China Domestic Dispatch
            CountryDelivery TimeWorking Days(not including holiday)5-78-1112-1415-1920-22>22Working Days+Saturday+Sunday5-910-1516-2021-2526-30>31United KingdomRate(item arrived)9.9%63.2%19.1%3.4%4.4%RefundAustraliaRate(item arrived)21.4%50%14.3%7.2%7.1%RefundFranceRate(item arrived)10.5%28.6%43.8%10.1%7%RefundGermanyRate(item arrived)11.1%22.2%30.3%20.9%15.5%RefundCanadaRate(item arrived)0%47.1%31.4%17.6%3.9%RefundSpainRate(item arrived)3.5%25%47.9%12.9%10.7%Refund Note:You can pay extra shipping cost to get express delivery, such as EMS, DHL or UPS. It just takes about 5-10 business days to receive order, please contact us if necessary.

            Returns


            We stand behind every product we sell. If you're not pleased with your purchase, we'll be happy to make an exchange or refund the product price less Shipping &handling within 30 days of your purchase via parcel post.
            Please contact us before you return the item, we will offer you the right return address
            For any exchange or refund, we need the product must be in its original receipt,including the box, packaging and all the accessories.
            Buyers are responsible for the returning shipping cost. Shipping and handling charges are not refundable.
            Refund and replacement: Once the carrier has received your item, Please allow up to 10 business days for returns to be processed.
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            Feedback

            PushAuctionThe L-Pro (L-Professional) filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photographic purpose at sub-rural area with heavy light pollution.

            On Mar-14-19 at 02:04:30 PDT, seller added the following information:

            DataCaciques

            Filed under: Eyepieces & Accessories