ZWO 1.25" Atmospheric Dispersion Corrector for Planetary Observing & Imaging ADC

Description: Description Ordering Info USA Shipping International Orders Returns Our eBay Store 1. PRODUCT DESCRIPTION Latest version which INCLUDES built-in bubble level as pictured in first photo above. ZWO Atmospheric Dispersion Corrector reduces the effect of atmospheric dispersion on lunar and planetary images Adjustable to a wide range of atmospheric dispersion for maximum flexibility High-quality optics and mechanics ensure ease of use and image fidelity Works best between Barlow lens and eyepiece/camera Priced at a fraction of competing solutions VOTED A "HOT SKY PRODUCT - 2017" BY SKY&TELESCOPE MAGAZINE! 1. The Problem of Atmospheric Dispersion Like a big glass prism or lens, the Earth's atmosphere refracts or bends the light from stars or planets on its way to a telescope, and it bends light of different colors by slightly different degrees. This effect is called atmospheric dispersion and it results in greater refraction of blue and green light than red light, for example. It's the same effect that causes the well-known 'Green Flash' on the upper edge of the Sun as it sets below the horizon. Of course, when you're imaging the planets or the Moon, especially when their light travels through the thick atmosphere above the horizon, dispersion is a big problem. If you're doing color imaging of planets low near the horizon, dispersion results in color fringing of the image. It can be removed with processing but at the cost of detail and resolution. If you image in monochrome with separate LRGB frames, you still suffer from atmospheric dispersion in the luminance frame. Even visual observers can notice the effects of dispersion when observing planets and the Moon low on the horizon where the effects of atmospheric dispersion are greatest. 2. Dispersion Compensation for Astroimagers and Visual Observers The ZWO Atmospheric Dispersion Corrector (ADC) is an ingenious device that compensates for the effects of atmospheric dispersion. The ZWO ADC uses a pair of prisms that can be precisely adjusted with manual levers to apply the opposite dispersion induced by the atmosphere. The device then directs all colors of light to re-converge at the focal plane. The adjustment can range from null (no correction) to maximum refraction suitable for correcting for the well-understood effect of atmospheric dispersion at a range of altitudes above the horizon. The effect of using the ZWO ADC? Greatly improved image resolution and detail for both imagers and visual observers, even when the planet is just above the horizon. You no longer need to wait hours for the planet to get higher in the sky during the night, or years for the planet to reach a more favorable opposition. 3. Designed for Ease of Use and Optimum Image Quality The ZWO Atmospheric Dispersion Corrector consists of three pieces. The main body holds the corrective prisms and adjustment levers. It includes two lever slots that overlap to allow both levers to move together over a wide range. There's also a 1.25" barrel adapter for the bottom of the main body to mount to a Barlow, and another 1.25" adapter for the top of the body to accept the camera or eyepiece. The outside of the top eyepiece/camera holder also includes male T threads to allow you to directly mount a camera with the appropriate threading. The ZWO ADC works best at large focal ratios, so you get optimum results when you place the device between a Barlow lens and the camera or eyepiece. The body of the ADC also has a white locking screw on the scale to mark the null point about which the levers are rotated to get the optimum correction of a given planet at a given altitude. This allows you to finely position the null point without having to rotate the body of the ADC. The levers also have an adjustable frictional resistance for ease of use. The prisms in the ZWO ADC have a 2° deviation angle and are made from H-K9L (Schott BK7) glass with surfaces polished to 1/10 wave accuracy. All optical surfaces are AR-coated to ensure >98% transmission over the visible spectrum. Priced at a fraction of competing ADC solutions, the ZWO Atmospheric Dispersion Corrector is one of the few devices available to counteract the distorting effects of our atmosphere. Designed by amateur astronomers for amateur astronomers, the ZWO ADC helps you extract maximum detail when observing or imaging the Moon and planets. Please note: 1) The ADC has no magnifying power, so it will not push the focus point in or out relative to your current focus point. However, this means that the amount of in-focus travel required is equivalent to the physical length of the ADC body which is 56mm. This is a significant amount, so not all telescopes might be able to reach focus with this accessory. If you are using a barlow placed in front of the ADC for imaging, the barlow would push the focal plane backwards (away from the scope) reducing the amount of in-focus travel needed. However, the exact amount would depend on the optical parameter of the barlow and the barlow-to-ADC distance.2) The eyepiece holder only comes with 2 screws as pictured, even though it is drilled for 3 screws. China Note: Occasionally, the product you receive might have a slightly different cosmetic appearance or labeling than what is shown. This can often change from batch to batch according to the whims of the manufacturer. However, you will always receive a brand new, original product as described above. Description copyright: Agena AstroProducts - Reproduction without permission prohibited. Back to Top 2. ORDERING INFORMATION A. Payment: You can pay via any payment method that eBay accepts. B. Shipping Method: United States Postal Service (USPS) or United Parcel Service (UPS) at your choice and expense (our choice if the item has free shipping option). eBay orders for items over $1,500 can only ship via UPS. C. Order Processing Time: Orders received by 12 noon Mon – Fri US Pacific Time generally ship on the same business day. Orders received after 12 noon PT or on weekends/holidays will ship by the next business day. D. Checkout: Please pay for the item(s) within 3 days from your account on eBay or by using the link in the email you receive from eBay. E. Shipping Discount: We offer combined shipping if you order multiple quantities/items and if items can be combined. eBay will automatically show you the correct combined/discounted shipping costs when you check-out. F. Combining Purchases: You can combine shipping for items purchased from us on eBay within 3 days. Buy the items individually and check out together for all items. eBay will combine the shipping weights and show you the discounted shipping cost. You must check out for all items together via eBay for this. We cannot combine shipping costs if you check out individually for your purchases. G. Sales Tax/VAT: Sales tax or VAT may be charged and collected by eBay as required by law based on your ship-to address and local tax/VAT rates. Please check with eBay. Back to Top 3. US SHIPPING A. Delivery Time: USPS First Class shipments will generally take 3-5 business days to arrive after we ship it. Priority Mail shipments will generally take 2-3 business days. However, these delivery times are NOT guaranteed by the USPS. Delays of up to 2 (or sometimes even 3) weeks can occur in about 5% of the shipments due to Covid, operational, or other issues. UPS shipments will generally take between 1 and 6 business days to be delivered depending on the method you select. USPS and UPS do NOT offer any refunds for shipping/delivery delays for ANY reason (except for UPS Next Day Air service). Delays are out of our control once your order ships. B. Tracking/Delivery Confirmation:eBay will update you once your order ships. You can see the order status or tracking information/link from your eBay account at any time. C. USPS Tracking Limitations: Please note that is common for USPS tracking to show “Shipping Label Created, USPS Awaiting Item” or “Shipment Received, Package Acceptance Pending” even several days after your order ships. This does not mean that there is a problem with your order or that we have not handed over your package to USPS yet. This simply means that your package is en route without an outbound scan and tracking will not be updated until the package reaches a distribution center at your end several days later. Back to Top 4. INTERNATIONAL ORDERING / SHIPPING A. Shipping Cost: Click on the "Shipping and Payments" tab above and select your country to see your shipping choices and cost. If you need a shipping cost estimate for multiple items, please contact us. B. Delivery Time: Please note that eBay’s delivery estimates shown are generally too optimistic! 1. UPS (All Shipping Methods): We strongly recommend the use of UPS for international orders due to issues related to the ongoing Covid situation. Delivery time usually varies between 3-7 business days depending on your country and the exact shipping method you select. 2. USPS First Class International: First class packages will usually be carried by GlobalPost (a USPS international delivery partner) for most of the way. Delivery at your end will be handled by your local postal service. Delivery generally takes about 3-4 weeks after we ship your package. This can frequently take 4-6 weeks or more for several countries (8 weeks for Italy, Argentina, and South Africa; 8-12 weeks for Brazil). There is very limited tracking available for 1st class shipments and there is no inquiry/tracing service. Once your package ships, we can do nothing but wait until your package arrives. Please do not become impatient and contact us in 2-3 weeks if your package has not arrived. If you don't receive the package in 6-8 weeks, contact us and we will work with you to resolve the issue. If you don't want to take the risk of this delay or lack of tracking, DO NOT USE First Class mail - use Priority or Express shipping, or better still, UPS instead. Packages are not considered lost unless 60 days have elapsed from the date of shipment. 3. USPS Priority Mail International: Delivery takes about 2 weeks to most countries after we ship your package. This can sometimes take 3-4 weeks to several countries. The USPS provides some basic tracking information for Priority shipping. Packages are not considered lost unless 60 days have elapsed from the date of shipment. 4. USPS Express Mail International: Delivery usually takes 5-10 business days after we ship your package. Packages are not considered lost unless 30 days have elapsed from the date of shipment. Again, these delivery times are NOT guaranteed by the US Postal Service. The most common reason for delays is slow customs inspection and clearance in your country, and can be very long, even for Express mail packages. Upon shipping your order, delivery delays are beyond our control, so do not leave us negative feedback or file a claim if your package is delayed. Delays are quite common but losses are very rare, so your patience and understanding will be greatly appreciated. C. Brokerage Fees, Customs and Duties: You are responsible for any carrier brokerage fees and duties/taxes that may be levied in your country. These are not included in our item price or shipping cost. UPS brokerage fees can be quite hefty. We have no control over these charges and cannot predict what they may be or if they will be levied upon delivery. Customs policies vary widely from country to country (Some countries such as UK are strict about imposing hefty customs duties). It is your responsibility to check with your country's customs office to determine what these additional costs will be prior to buying. Customs fees are normally charged by the delivery company or your country's postal service or collected when you pick the item up. These fees are NOT additional shipping charges. Back to Top 5. RETURN/EXCHANGE POLICY A. US Orders: Returns must be shipped back within 30 days. All returned items must be in brand new, resalable condition with original manufacturer’s packaging. A minimum restocking fee of 10% will be deducted if there is any evidence of use or wear, dirt, scratches, missing packaging/parts, etc. We may levy a larger restocking fee if the condition warrants it, or even refuse returns entirely if returned in heavily used/abused condition. Shipping fees are non-refundable (for items with free or discounted fixed shipping, the actual outbound S&H cost we incurred will be deducted) and you are responsible for all return shipping costs. Please contact us first before returning an item. B. International Orders: No returns/exchanges accepted unless the item we shipped is defective. Please research the product and ask us any questions BEFORE you purchase to make sure you are buying the correct item for your needs. Back to Top Click any image below to view hundreds of products in our eBay Store...

Price: 135.7 USD

Location: Cerritos, California

End Time: 2024-11-04T18:31:06.000Z

Shipping Cost: N/A USD