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 secondsPackage Included:- 1 x FilterAbout Payment: 1.we have no Combined shipping when you bid much of order. Thanks for your kindly understand. 2. Payment must be received within 7 days after auctions ended. Please do not bid if you are not intending to buy. Unpaid dispute will be filed to eBay for the non payable bidders. 3. We do not combine shipping cost.thanks again. About Shipping: 1. All items will be arranged shipping within one business day upon payment cleared. 2. Ship by Standard Flat Rate Shipping Service,under normal circumstance, .In most cases, international shipping takes around 8- 14 business days. We try our best to provide you the most reliable, affordable way of shipping service. But sometimes international delivery is highly depended on the local customs and post service. If you do not receive your item on time, please contact us immediately for further assistance. We will be responsible for any damages or losses incurred in the shipping process.About Returens: 1. If you are dissatisfied with our item or service, then please follow the good eBay practice to contact us by ebay message before leaving any feedback. We are committed to resolve all issues in a friendly and satisfactory manner. 2. We always reply to ebay messages within 10-18 business days. If you do not get a response from us, then please check your ebay message. we only reply ebay message, no send email. 3. Original and return shipping fee will not be refunded or reimbursed under all circumstances. You must agree and acknowledge this term if you bid for this item. Therefore, please do not complain about having to ship back at your own expense. Contact Us: 1. If have any question, Please contact us by ebay message. Reply within 24hours. 2. We care about our valued buyers, if you have any questions, our Customer Service staffs will be very glad to help you. We try our best to reply to your emails as soon as possible, however, due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. Please allow 24 business hours for us to response. Feedback: Dear buyers, we appreciate your business, if you are satisfied with our service, please leave us a positive feedback and rate the details of the transaction (Detailed Seller Ratings) with a "PERFECT 5 STARS". [When you rate the shipping time part please take international transit into consideration.] Your recognition will make us more confident to develop business and serve you better. Our goal is to make sure you are a happy buyer and pleasant shopping with us. Please give us ebay message before leaving any 1 or 2 ratings, neutral, negative feedback or open any dispute. We understand the concerns and frustrations you might have, and will do our endeavor to resolve the issues. Please give us the opportunity to resolve any problem.Here is illustration shows how to leave me the feedback, please follow the step, thank you very much! And hope to see you soon.
Price: 309.59 USD
Location: BEIJING
End Time: 2024-10-10T13:19:18.000Z
Shipping Cost: 0 USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money back or replacement (buyer's choice)
Brand: Unbranded
Type: Filter
Unit Type: Unit
Manufacturer Warranty: 3 Years
Unit Quantity: 1