Optolong 3nm L-Ultimate Dual Narrowband Filter for Astronomical Color Camera

Description: Description Optolong 3nm L-Ultimate Dual Narrowband Filter for Astronomical Color Camera Light Pollution Decrease Advantage: - The advantage of L-Ultimate is that it only passes through the emission lines OIII (500.7nm) and Ha (656.3nm) of the nebula, and in this case, all other light contaminated rays are cut off, so that only the signals of the emission and reflection nebula can be obtained during imaging. Therefore, it can make the sky background of the image darker, and maximize the contrast and signal-to-noise ratio between nebulae. In areas severely affected by light pollution, this product can also selectively filter out light pollution and noise signals through nebular emission lines, ultimately avoiding the impact of light pollution on astronomical photography. - The difference between this product and the same series of dual narrowband L-eNhance and L-eXtreme lies in that L-Ultimate is a dual 3nm bandpass filter that only passes through Ha and OIII emission lines, which can obtain a darker sky background in photography, and has stronger suppression on star points, contrast between nebulae, and contrast enhancement. The filter has also been optimized in terms of halo performance, so there will be no obvious halo when shooting bright star targets. Specification: - Filter material: optical glass - Filter thickness: 1.85mm - Bandwidth value: OIII 3nm; Ha 3nm - Cutoff range: 300 - 1000nm - Cutoff depth: > OD4 - Degree of finish: 60/40 - Surface shape: λ/4 - Depth of parallelism: 30 seconds Package Included: - 1 x Filter Payment Terms 1. We accept PayPal,Payoneer,Visa Card,Google pay,Credit card etc. 2. We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay.Shipping Terms 1. We will process the order within the handling time ,if you have any questions, please contact us via eBay message or email. 2. For remote regions of DHL/FedEx..., extra shipping costs might be charged. Usually it costs about 30USD-50USD. We will contact you if shipping company informed us your address belongs to remote area. Thanks for your understanding.Return Terms If you receive the item that not satisfied or defective, please do not open case and kindly notify us within 30 days. We will guide you the returning process for replacement or refund.Custom Duties & Taxes 1. It is buyer's responsibility to cover the import duties, taxes.We do not charge any taxes and fees, and the possible taxes and fees will be collected by the platform or by third parties such as customs and carriers. 2. Please check with your country's customs office and inform us what/how much should declare before shipping.Feedback 1. Please kindly leave us a positive feedback and 5 star DSR if you satisfied with our product and service. Please feel free to contact us firstly if you have any problem with your order, we are responsible and credible seller and will solve the issue it for you asap. 2. If you are dissatisfied for any reason, please don't be quick to leave us neutral or negative feedback. We work hard to make sure EVERY CUSTOMER 100% SATISFIED and resolve any problem for you and always leave positive feedback to all our customers. On Jan 18, 2024 at 04:58:03 PST, seller added the following information:

Price: 310.29 USD

Location: Shenzhen

End Time: 2024-04-26T03:03:19.000Z

Shipping Cost: 5 USD